76 lines
2.8 KiB
Markdown
76 lines
2.8 KiB
Markdown
# Paypal Express
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Bridge between ActiveMerchant's paypal express (PPX) gateway code and Spree
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## Setup and Customization
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It's currently set up to run the UK version of the gateway, but this isn't an essential detail - should be easy to change.
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1. Start by creating/identifying the relevant class representing your locale's paypal express gateway
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and change the +clazz+ in the migration and/or the database.
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2. Modify +lib/spree/paypal_express.rb+ to load up details for your gateway
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You'll notice that I'm using Spree's gateway config mechanism. This choice is debatable: Spree is basically
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set up for using one gateway at a time, whereas we probably want a main gateway plus Paypal as a backup
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choice.
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## Interaction with Spree
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The bridge code receives authorization and transaction info from PPX and converts it into the Spree
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equivalent.
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The payment representation isn't perfect: basically, Spree is oriented towards creditcards and some
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work is needed to generalise it to other options. For now, it is a bit hacked. (See the TODO list.)
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## Relationship with active merchant
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This ext contains three files which are updates or extensions to current active merchant code. They are
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loaded up when the extension is initialized, and will over-ride the existing gem files. The modifications
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update the base protocol, eg allowing detailed order info to be passed, and supporting some of the new
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options in version 57.0.
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## Testing
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Get an account for Paypal's Sandbox system first. Very good testing system!
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Pity it logs you off automatically after a relatively short time period
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## Status and Known issues
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IMPORTANT: requires edge rails (it might work with 0.8.4)
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[06Jul09] I don't know of any serious bugs or issues at present in this code, so you should be able to
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start using this without serious problems - but do note the TODO list below.
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** Temporarily, I've had to over-ride two admin views: order/show and payments/index: this will be unpicked
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once Spree is generalised to support payment types other than creditcards
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WARNING: there seems to be an issue with the :shipping_discount issue which causes submitted order
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info to be ignored (and not displayed) - see +lib/spree/paypal_express.rb+ for more info, so I suggest
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avoiding this option unless you've tested it.
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## TODO
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0. Allow easy change of locale for gateway version
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1. Move gateway config to the preferences system, to avoid interference with main gateways?
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2. Add support for accepting PPX payment at the credit card stage (important)
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3. Look at using PPX to assist in shipping method choices (or present user with a choice before
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they jump to PPX interaction)
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4. Improve payment tracking support in Spree (eg generalise beyond creditcard bias)
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5. Add some tests
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6. Get some of my code into active merchant
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