66 lines
2.4 KiB
Python
66 lines
2.4 KiB
Python
import logging
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import openerp
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from openerp import SUPERUSER_ID
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from openerp.osv import fields
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from openerp.osv.orm import Model
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_logger = logging.getLogger(__name__)
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class ir_model_relation(Model):
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"""
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This model tracks PostgreSQL tables used to implement OpenERP many2many
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relations.
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"""
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_name = 'ir.model.relation'
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_columns = {
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'name': fields.char('Relation Name', required=True, size=128, select=1,
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help="PostgreSQL table name implementing a many2many relation."),
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'model': fields.many2one('ir.model', string='Model',
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required=True, select=1),
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'module': fields.many2one('ir.module.module', string='Module',
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required=True, select=1),
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'date_update': fields.datetime('Update Date'),
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'date_init': fields.datetime('Initialization Date')
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}
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def _module_data_uninstall(self, cr, uid, ids, context=None):
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"""
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Delete PostgreSQL many2many relations tracked by this model.
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"""
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if uid != SUPERUSER_ID and not self.pool.get('ir.model.access').check_groups(cr, uid, "base.group_system"):
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raise except_orm(_('Permission Denied'), (_('Administrator access is required to uninstall a module')))
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ids_set = set(ids)
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to_drop_table = []
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ids.sort()
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ids.reverse()
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to_unlink = []
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for data in self.browse(cr, uid, ids, context):
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model = data.model
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model_obj = self.pool.get(model)
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name = openerp.tools.ustr(data.name)
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# double-check we are really going to delete all the owners of this schema element
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cr.execute("""SELECT id from ir_model_relation where name = %s""", (data.name,))
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external_ids = [x[0] for x in cr.fetchall()]
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if (set(external_ids)-ids_set):
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# as installed modules have defined this element we must not delete it!
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continue
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cr.execute("SELECT 1 FROM information_schema.tables WHERE table_name=%s", (name,))
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if cr.fetchone() and not name in to_drop_table:
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to_drop_table.append(name)
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to_unlink.append(data.id)
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self.unlink(cr, uid, to_unlink, context)
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# drop m2m relation tables
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for table in to_drop_table:
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cr.execute('DROP TABLE %s CASCADE'% (table),)
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_logger.info('Dropped table %s', table)
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cr.commit()
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