modify the expression parser to use a (more) real polish notation.
bzr revid: christophe@tinyerp.com-20080814120441-wv4tmqj06ze725ph
This commit is contained in:
Christophe Simonis
parent
c61dd6273e
commit
4944ae6cdb
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@ -1,67 +1,28 @@
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#!/usr/bin/env python
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#!/usr/bin/env python
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# -*- encoding: utf-8 -*-
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# -*- encoding: utf-8 -*-
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from tools import flatten
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from tools import flatten, reverse_enumerate
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class expression(object):
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class expression(object):
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"""
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"""
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parse a domain expression
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parse a domain expression
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examples:
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use a real polish notation
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leafs are still in a ('foo', '=', 'bar') format
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>>> e = [('foo', '=', 'bar')]
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For more info: http://...
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>>> expression(e).parse().to_sql()
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'foo = bar'
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>>> e = [('id', 'in', [1,2,3])]
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>>> expression(e).parse().to_sql()
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'id in (1, 2, 3)'
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>>> e = [('field', '=', 'value'), ('field', '<>', 'value')]
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>>> expression(e).parse().to_sql()
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'( field = value AND field <> value )'
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>>> e = [('&', ('field', '<', 'value'), ('field', '>', 'value'))]
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>>> expression(e).parse().to_sql()
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'( field < value AND field > value )'
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>>> e = [('|', ('field', '=', 'value'), ('field', '=', 'value'))]
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>>> expression(e).parse().to_sql()
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'( field = value OR field = value )'
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>>> e = [('&', ('field1', '=', 'value'), ('field2', '=', 'value'), ('|', ('field3', '<>', 'value'), ('field4', '=', 'value')))]
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>>> expression(e).parse().to_sql()
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'( field1 = value AND field2 = value AND ( field3 <> value OR field4 = value ) )'
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>>> e = [('&', ('|', ('a', '=', '1'), ('b', '=', '2')), ('|', ('c', '=', '3'), ('d', '=', '4')))]
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>>> expression(e).parse().to_sql()
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'( ( a = 1 OR b = 2 ) AND ( c = 3 OR d = 4 ) )'
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>>> e = [('|', (('a', '=', '1'), ('b', '=', '2')), (('c', '=', '3'), ('d', '=', '4')))]
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>>> expression(e).parse().to_sql()
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'( ( a = 1 AND b = 2 ) OR ( c = 3 AND d = 4 ) )'
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>>> expression(e).parse().get_tables()
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[]
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>>> expression('fail').parse().to_sql()
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Traceback (most recent call last):
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...
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ValueError: Bad expression: 'fail'
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>>> e = [('fail', 'is', 'True')]
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>>> expression(e).parse().to_sql()
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Traceback (most recent call last):
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...
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ValueError: Bad expression: ('&', ('fail', 'is', 'True'))
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"""
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"""
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def _is_operator(self, element):
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def _is_operator(self, element):
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return isinstance(element, str) \
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return isinstance(element, str) \
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and element in ['&', '|']
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and element in ['&', '|', '!']
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def _is_leaf(self, element):
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def _is_leaf(self, element):
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return isinstance(element, tuple) \
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return isinstance(element, tuple) \
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and len(element) == 3 \
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and len(element) == 3 \
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and element[1] in ('=', '!=', '<>', '<=', '<', '>', '>=', '=like', 'like', 'not like', 'ilike', 'not ilike', 'in', 'not in', 'child_of')
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and element[1] in ('=', '!=', '<>', '<=', '<', '>', '>=', '=like', 'like', 'not like', 'ilike', 'not ilike', 'in', 'not in', 'child_of')
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def _is_expression(self, element):
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return isinstance(element, tuple) \
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and len(element) > 2 \
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and self._is_operator(element[0])
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def __execute_recursive_in(self, cr, s, f, w, ids):
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def __execute_recursive_in(self, cr, s, f, w, ids):
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#deprecated -> use _left and _right...
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res = []
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res = []
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for i in range(0, len(ids), cr.IN_MAX):
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for i in range(0, len(ids), cr.IN_MAX):
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subids = ids[i:i+cr.IN_MAX]
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subids = ids[i:i+cr.IN_MAX]
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@ -74,41 +35,21 @@ class expression(object):
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def __init__(self, exp):
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def __init__(self, exp):
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if exp and isinstance(exp, tuple):
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if not self._is_leaf(exp) and not self._is_operator(exp[0]):
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# check if the expression is valid
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exp = list(exp)
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if not reduce(lambda acc, val: acc and (self._is_operator(val) or self._is_leaf(val)), exp, True):
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if exp and isinstance(exp, list):
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raise ValueError('Bad expression: %r' % (exp,))
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if len(exp) == 1 and self._is_leaf(exp[0]):
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exp = exp[0]
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else:
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if len(exp) == 3 and self._is_leaf(tuple(exp)):
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exp=[exp]
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if not self._is_operator(exp[0][0]):
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if isinstance(exp[0],list):
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exp=tuple(exp[0])
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else:
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exp.insert(0, '&')
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exp = tuple(exp)
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else:
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exp = exp[0]
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self.__exp = exp
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self.__exp = exp
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self.__operator = '&'
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self.__tables = {} # used to store the table to use for the sql generation. key = index of the leaf
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self.__children = []
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self.__tables = []
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self.__joins = []
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self.__joins = []
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self.__table = None
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self.__main_table = None # 'root' table. set by parse()
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self.__DUMMY_LEAF = (1, '=', 1) # a dummy leaf that must not be parsed or sql generated
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self.__left, self.__right = None, None
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if self._is_leaf(self.__exp):
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self.__left, self.__operator, self.__right = self.__exp
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if isinstance(self.__right, list):
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self.__right = tuple(self.__right)
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elif exp and not self._is_expression(self.__exp):
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raise ValueError('Bad expression: %r' % (self.__exp,))
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def parse(self, cr, uid, table, context):
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def parse(self, cr, uid, table, context):
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""" transform the leafs of the expression """
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def _rec_get(ids, table, parent):
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def _rec_get(ids, table, parent):
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if not ids:
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if not ids:
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@ -119,228 +60,225 @@ class expression(object):
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if not self.__exp:
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if not self.__exp:
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return self
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return self
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if self._is_leaf(self.__exp):
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self.__main_table = table
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self.__table = table
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working_table = table
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self.__tables.append(self.__table._table)
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if self.__left in table._inherit_fields:
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for i, e in enumerate(self.__exp):
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self.__table = table.pool.get(table._inherit_fields[self.__left][0])
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if self._is_operator(e) or e == self.__DUMMY_LEAF:
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if self.__table._table not in self.__tables:
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continue
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self.__tables.append(self.__table._table)
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left, operator, right = e
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self.__joins.append('%s.%s' % (table._table, table._inherits[self.__table._name]))
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fargs = self.__left.split('.', 1)
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if left in table._inherit_fields:
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field = self.__table._columns.get(fargs[0], False)
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working_table = table.pool.get(table._inherit_fields[self.__left][0])
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if working_table not in self.__tables.values():
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self.__joins.append('%s.%s' % (table._table, table._inherits[working_table._name]))
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self.__tables[i] = working_table
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fargs = left.split('.', 1)
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field = working_table._columns.get(fargs[0], False)
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if not field:
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if not field:
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if self.__left == 'id' and self.__operator == 'child_of':
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if left == 'id' and operator == 'child_of':
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self.__right += _rec_get(self.__right, self.__table, self.__table._parent_name)
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right += _rec_get(right, working_table, working_table._parent_name)
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self.__operator = 'in'
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self.__exp[i] = ('id', 'in', right)
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return self
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continue
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field_obj = table.pool.get(field._obj)
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if len(fargs) > 1:
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if len(fargs) > 1:
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if field._type == 'many2one':
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if field._type == 'many2one':
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self.__left = fargs[0]
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right = field_obj.search(cr, uid, [(fargs[1], operator, right)], context=context)
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self.__right = table.pool.get(field._obj).search(cr, uid, [(fargs[1], self.__operator, self.__right)], context=context)
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self.__exp[i] = (fargs[0], 'in', right)
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self.__operator = 'in'
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continue
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return self
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field_obj = table.pool.get(field._obj)
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if field._properties:
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if field._properties:
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# this is a function field
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# this is a function field
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if not field._fnct_search and not field.store:
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if not field.store:
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# the function field doesn't provide a search function and doesn't store values in the database, so we must ignore it : we generate a dummy leaf
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if not field._fnct_search:
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self.__left, self.__operator, self.__right = 1, '=', 1
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# the function field doesn't provide a search function and doesn't store
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self.__exp = '' # force to generate an empty sql expression
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# values in the database, so we must ignore it : we generate a dummy leaf
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else:
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self.__exp[i] = self.__DUMMY_LEAF
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# we need to replace this leaf to a '&' expression
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else:
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# we clone ourself...
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subexp = field.search(cr, uid, table, left, [self.__exp[i]])
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import copy
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# we assume that the expression is valid
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newexp = copy.copy(self)
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# we create a dummy leaf for forcing the parsing of the resulting expression
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self.__table = None
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self.__exp[i] = '&'
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self.__tables, self.__joins = [], []
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self.__exp.insert(i + 1, self.__DUMMY_LEAF)
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self.__children = []
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for j, se in enumerate(subexp):
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self.__exp.insert(i + 2 + j, se)
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# else, the value of the field is store in the database, so we search on it
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if field._fnct_search:
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subexp = field.search(cr, uid, table, self.__left, [self.__exp])
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self.__children.append(expression(subexp).parse(cr, uid, table, context))
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if field.store:
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self.__children.append(newexp)
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self.__left, self.__right = None, None
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self.__operator = '&'
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self.__exp = ('&',) + tuple([tuple(e.__exp) for e in self.__children])
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elif field._type == 'one2many':
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elif field._type == 'one2many':
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if isinstance(self.__right, basestring):
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if isinstance(right, basestring):
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ids2 = [x[0] for x in field_obj.name_search(cr, uid, self.__right, [], self.__operator)]
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ids2 = [x[0] for x in field_obj.name_search(cr, uid, right, [], operator)]
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else:
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else:
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ids2 = self.__right
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ids2 = list(right)
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if not ids2:
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if not ids2:
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self.__left, self.__operator, self.__right = 'id', '=', '0'
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self.__exp[i] = ('id', '=', '0')
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else:
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else:
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self.__left, self.__operator, self.__right = 'id', 'in', self.__execute_recursive_in(cr, field._fields_id, field_obj._table, 'id', ids2)
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self.__exp[i] = ('id', 'in', self.__execute_recursive_in(cr, field._fields_id, field_obj._table, 'id', ids2))
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elif field._type == 'many2many':
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elif field._type == 'many2many':
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#FIXME
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#FIXME
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if self.__operator == 'child_of':
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if operator == 'child_of':
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if isinstance(self.__right, basestring):
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if isinstance(right, basestring):
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ids2 = [x[0] for x in field_obj.name_search(cr, uid, self.__right, [], 'like')]
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ids2 = [x[0] for x in field_obj.name_search(cr, uid, right, [], 'like')]
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else:
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else:
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ids2 = self.__right
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ids2 = list(right)
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def _rec_convert(ids):
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def _rec_convert(ids):
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if field_obj == table:
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if field_obj == table:
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return ids
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return ids
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return self.__execute_recursive_in(cr, field._id1, field._rel, field._id2, ids)
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return self.__execute_recursive_in(cr, field._id1, field._rel, field._id2, ids)
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self.__left, self.__operator, self.__right = 'id', 'in', _rec_convert(ids2 + _rec_get(ids2, field_obj, self.__table._parent_name))
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self.__exp[i] = ('id', 'in', _rec_convert(ids2 + _rec_get(ids2, field_obj, working_table._parent_name)))
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else:
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else:
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if isinstance(self.__right, basestring):
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if isinstance(right, basestring):
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res_ids = [x[0] for x in field_obj.name_search(cr, uid, self.__right, [], self.__operator)]
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res_ids = [x[0] for x in field_obj.name_search(cr, uid, right, [], operator)]
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else:
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else:
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res_ids = self.__right
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res_ids = list(right)
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self.__left, self.__operator, self.__right = 'id', 'in', self.__execute_recursive_in(cr, field._id1, field._rel, field._id2, res_ids) or [0]
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self.__exp[i] = ('id', 'in', self.__execute_recursive_in(cr, field._id1, field._rel, field._id2, res_ids) or [0])
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elif field._type == 'many2one':
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elif field._type == 'many2one':
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if self.__operator == 'child_of':
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if operator == 'child_of':
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if isinstance(self.__right, basestring):
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if isinstance(right, basestring):
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ids2 = [x[0] for x in field_obj.search_name(cr, uid, self.__right, [], 'like')]
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ids2 = [x[0] for x in field_obj.search_name(cr, uid, right, [], 'like')]
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else:
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else:
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ids2 = list(self.__right)
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ids2 = list(right)
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self.__operator = 'in'
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self.__operator = 'in'
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if field._obj != self.__table._name:
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if field._obj != working_table._name:
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self.__right = ids2 + _rec_get(ids2, field_obj, self.__table._parent_name)
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right = ids2 + _rec_get(ids2, field_obj, working_table._parent_name)
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else:
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else:
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self.__right = ids2 + _rec_get(ids2, self.__table, self.__left)
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right = ids2 + _rec_get(ids2, working_table, left)
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self.__left = 'id'
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left = 'id'
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self.__exp[i] = (left, 'in', right)
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else:
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else:
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if isinstance(self.__right, basestring):
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if isinstance(right, basestring):
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res_ids = field_obj.name_search(cr, uid, self.__right, [], self.__operator)
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res_ids = field_obj.name_search(cr, uid, right, [], operator)
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self.__operator = 'in'
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right = map(lambda x: x[0], res_ids)
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self.__right = map(lambda x: x[0], res_ids)
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self.__exp[i] = (left, 'in', right)
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else:
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else:
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# other field type
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# other field type
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if field.translate:
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if field.translate:
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if self.__operator in ('like', 'ilike', 'not like', 'not ilike'):
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if operator in ('like', 'ilike', 'not like', 'not ilike'):
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self.__right = '%%%s%%' % self.__right
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right = '%%%s%%' % right
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query1 = '( SELECT res_id' \
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query1 = '( SELECT res_id' \
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' FROM ir_translation' \
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' FROM ir_translation' \
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' WHERE name = %s' \
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' WHERE name = %s' \
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' AND lang = %s' \
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' AND lang = %s' \
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' AND type = %s' \
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' AND type = %s' \
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' AND value ' + self.__operator + ' %s' \
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' AND value ' + operator + ' %s' \
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') UNION (' \
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') UNION (' \
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' SELECT id' \
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' SELECT id' \
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' FROM "' + self.__table._table + '"' \
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' FROM "' + working_table._table + '"' \
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' WHERE "' + self.__left + '" ' + self.__operator + ' %s' \
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' WHERE "' + left + '" ' + operator + ' %s' \
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')'
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')'
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query2 = [self.__table._name + ',' + self.__left,
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query2 = [working_table._name + ',' + left,
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context.get('lang', False) or 'en_US',
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context.get('lang', False) or 'en_US',
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'model',
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'model',
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self.__right,
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right,
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self.__right,
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right,
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]
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]
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self.__left = 'id'
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self.__exp[i] = ('id', 'inselect', (query1, query2))
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self.__operator = 'inselect'
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self.__right = (query1, query2,)
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elif self._is_expression(self.__exp):
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self.__operator = self.__exp[0]
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for element in self.__exp[1:]:
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if not self._is_operator(element):
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self.__children.append(expression(element).parse(cr, uid, table, context))
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return self
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return self
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def to_sql(self):
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def __leaf_to_sql(self, leaf, table):
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if not self.__exp:
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left, operator, right = leaf
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return ('', [])
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elif self._is_leaf(self.__exp):
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if self.__operator == 'inselect':
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query = '(%s.%s in (%s))' % (self.__table._table, self.__left, self.__right[0])
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params = self.__right[1]
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|
||||||
elif self.__operator in ['in', 'not in']:
|
|
||||||
params = self.__right[:]
|
|
||||||
len_before = len(params)
|
|
||||||
for i in range(len_before)[::-1]:
|
|
||||||
if params[i] == False:
|
|
||||||
del params[i]
|
|
||||||
|
|
||||||
len_after = len(params)
|
if operator == 'inselect':
|
||||||
check_nulls = len_after != len_before
|
query = '(%s.%s in (%s))' % (table._table, left, right[0])
|
||||||
query = '(1=0)'
|
params = right[1]
|
||||||
|
elif operator in ['in', 'not in']:
|
||||||
|
params = right[:]
|
||||||
|
len_before = len(params)
|
||||||
|
for i in range(len_before)[::-1]:
|
||||||
|
if params[i] == False:
|
||||||
|
del params[i]
|
||||||
|
|
||||||
if len_after:
|
len_after = len(params)
|
||||||
if self.__left == 'id':
|
check_nulls = len_after != len_before
|
||||||
instr = ','.join(['%d'] * len_after)
|
query = '(1=0)'
|
||||||
else:
|
|
||||||
instr = ','.join([self.__table._columns[self.__left]._symbol_set[0]] * len_after)
|
|
||||||
|
|
||||||
query = '(%s.%s %s (%s))' % (self.__table._table, self.__left, self.__operator, instr)
|
if len_after:
|
||||||
|
if left == 'id':
|
||||||
if check_nulls:
|
instr = ','.join(['%d'] * len_after)
|
||||||
query = '(%s OR %s IS NULL)' % (query, self.__left)
|
|
||||||
else:
|
|
||||||
params = []
|
|
||||||
if self.__right is False and self.__operator == '=':
|
|
||||||
query = '%s IS NULL' % self.__left
|
|
||||||
elif self.__right is False and self.__operator == '<>':
|
|
||||||
query = '%s IS NOT NULL' % self.__left
|
|
||||||
else:
|
else:
|
||||||
if self.__left == 'id':
|
instr = ','.join([table._columns[left]._symbol_set[0]] * len_after)
|
||||||
query = '%s.id %s %%s' % (self.__table._table, self.__operator)
|
query = '(%s.%s %s (%s))' % (table._table, left, operator, instr)
|
||||||
params = self.__right
|
|
||||||
else:
|
|
||||||
like = self.__operator in ('like', 'ilike', 'not like', 'not ilike')
|
|
||||||
|
|
||||||
op = self.__operator == '=like' and 'like' or self.__operator
|
|
||||||
if self.__left in self.__table._columns:
|
|
||||||
format = like and '%s' or self.__table._columns[self.__left]._symbol_set[0]
|
|
||||||
query = '(%s.%s %s %s)' % (self.__table._table, self.__left, op, format)
|
|
||||||
else:
|
|
||||||
query = "(%s.%s %s '%s')" % (self.__table._table, self.__left, op, self.__right)
|
|
||||||
|
|
||||||
add_null = False
|
|
||||||
if like:
|
|
||||||
if isinstance(self.__right, str):
|
|
||||||
str_utf8 = self.__right
|
|
||||||
elif isinstance(self.__right, unicode):
|
|
||||||
str_utf8 = self.__right.encode('utf-8')
|
|
||||||
else:
|
|
||||||
str_utf8 = str(self.__right)
|
|
||||||
params = '%%%s%%' % str_utf8
|
|
||||||
add_null = not str_utf8
|
|
||||||
elif self.__left in self.__table._columns:
|
|
||||||
params = self.__table._columns[self.__left]._symbol_set[1](self.__right)
|
|
||||||
|
|
||||||
if add_null:
|
|
||||||
query = '(%s OR %s IS NULL)' % (query, self.__left)
|
|
||||||
|
|
||||||
joins = ' AND '.join(map(lambda j: '%s.id = %s' % (self.__table._table, j), self.__joins))
|
|
||||||
if joins:
|
|
||||||
query = '(%s AND (%s))' % (joins, query)
|
|
||||||
if isinstance(params, basestring):
|
|
||||||
params = [params]
|
|
||||||
return (query, params)
|
|
||||||
|
|
||||||
|
if check_nulls:
|
||||||
|
query = '(%s OR %s IS NULL)' % (query, left)
|
||||||
else:
|
else:
|
||||||
children = [child.to_sql() for child in self.__children]
|
params = []
|
||||||
params = flatten([child[1] for child in children])
|
if right is False and operator == '=':
|
||||||
query = "( %s )" % (" %s " % {'&': 'AND', '|': 'OR'}[self.__operator]).join([child[0] for child in children if child[0]])
|
query = '%s IS NULL' % left
|
||||||
return (query, params)
|
elif right is False and operator in ['<>', '!=']:
|
||||||
|
query = '%s IS NOT NULL' % left
|
||||||
|
else:
|
||||||
|
if left == 'id':
|
||||||
|
query = '%s.id %s %%s' % (table._table, operator)
|
||||||
|
params = right
|
||||||
|
else:
|
||||||
|
like = operator in ('like', 'ilike', 'not like', 'not ilike')
|
||||||
|
|
||||||
def __get_tables(self):
|
op = operator == '=like' and 'like' or operator
|
||||||
return self.__tables + [child.__get_tables() for child in self.__children]
|
if left in table._columns:
|
||||||
|
format = like and '%s' or table._columns[left]._symbol_set[0]
|
||||||
|
query = '(%s.%s %s %s)' % (table._table, left, op, format)
|
||||||
|
else:
|
||||||
|
query = "(%s.%s %s '%s')" % (table._table, left, op, right)
|
||||||
|
|
||||||
|
add_null = False
|
||||||
|
if like:
|
||||||
|
if isinstance(right, str):
|
||||||
|
str_utf8 = right
|
||||||
|
elif isinstance(right, unicode):
|
||||||
|
str_utf8 = right.encode('utf-8')
|
||||||
|
else:
|
||||||
|
str_utf8 = str(right)
|
||||||
|
params = '%%%s%%' % str_utf8
|
||||||
|
add_null = not str_utf8
|
||||||
|
elif left in table._columns:
|
||||||
|
params = table._columns[left]._symbol_set[1](right)
|
||||||
|
|
||||||
|
if add_null:
|
||||||
|
query = '(%s OR %s IS NULL)' % (query, left)
|
||||||
|
|
||||||
|
if isinstance(params, basestring):
|
||||||
|
params = [params]
|
||||||
|
return (query, params)
|
||||||
|
|
||||||
|
|
||||||
|
def to_sql(self):
|
||||||
|
stack = []
|
||||||
|
params = []
|
||||||
|
for i, e in reverse_enumerate(self.__exp):
|
||||||
|
if self._is_leaf(e):
|
||||||
|
table = self.__tables.has_key(i) and self.__tables[i] or self.__main_table
|
||||||
|
q, p = self.__leaf_to_sql(e, table)
|
||||||
|
params.insert(0, p)
|
||||||
|
stack.append(q)
|
||||||
|
else:
|
||||||
|
if e == '!':
|
||||||
|
stack.append('(NOT (%s))' % (stack.pop(),))
|
||||||
|
else:
|
||||||
|
ops = {'&': ' AND ', '|': ' OR '}
|
||||||
|
q1 = stack.pop()
|
||||||
|
q2 = stack.pop()
|
||||||
|
stack.append('(%s %s %s)' % (q1, ops[e], q2,))
|
||||||
|
|
||||||
|
query = ' AND '.join(reversed(stack))
|
||||||
|
joins = ' AND '.join(map(lambda j: '%s.id = %s' % (self.__main_table._table, j), self.__joins))
|
||||||
|
if joins:
|
||||||
|
query = '(%s AND (%s))' % (joins, query)
|
||||||
|
return (query, flatten(params))
|
||||||
|
|
||||||
def get_tables(self):
|
def get_tables(self):
|
||||||
return ['"%s"' % t for t in set(flatten(self.__get_tables()))]
|
return ['"%s"' % t._table for t in set(self.__tables.values())]
|
||||||
|
|
||||||
#def
|
|
||||||
|
|
||||||
if __name__ == '__main__':
|
|
||||||
pass
|
|
||||||
#import doctest
|
|
||||||
#doctest.testmod()
|
|
||||||
|
|
||||||
# vim:expandtab:smartindent:tabstop=4:softtabstop=4:shiftwidth=4:
|
# vim:expandtab:smartindent:tabstop=4:softtabstop=4:shiftwidth=4:
|
||||||
|
|
||||||
|
|
|
||||||
|
|
@ -2280,7 +2280,10 @@ class orm(orm_template):
|
||||||
# if the object has a field named 'active', filter out all inactive
|
# if the object has a field named 'active', filter out all inactive
|
||||||
# records unless they were explicitely asked for
|
# records unless they were explicitely asked for
|
||||||
if 'active' in self._columns and (active_test and context.get('active_test', True)):
|
if 'active' in self._columns and (active_test and context.get('active_test', True)):
|
||||||
args = [('&', ('active', '=', 1), tuple(args))]
|
if args:
|
||||||
|
args = ['&', ('active', '=', 1)] + args
|
||||||
|
else:
|
||||||
|
args = [('active', '=', 1)]
|
||||||
|
|
||||||
if args:
|
if args:
|
||||||
import expression
|
import expression
|
||||||
|
|
|
||||||
Loading…
Reference in New Issue