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Patch #12499

closed

Use lambda in model scopes

Added by Jean-Baptiste Barth about 12 years ago. Updated about 12 years ago.

Status:
Closed
Priority:
Normal
Assignee:
Jean-Baptiste Barth
Category:
Plugin API
Target version:
2.3.0
Start date:
Due date:
% Done:

0%

Estimated time:

Description

Yesterday I had to monkey-patch "Group" in a plugin, and it turned out to be really difficult because there's a scope defined in the Group class which doesn't use lambda. In this case, the scope is evaluated directly, which fails with "Could not find table users" for instance if you're in a "db:migrate" phase and your database is empty.

Hence I propose moving all scopes to their lambda form so that these difficulties disappear for plugin development.

One more thing, using scopes without lambda (or a call-able) will be deprecated in Rails 4 and probably removed in Rails 4.1 (see this commit).

Let me know what you think. If you're OK with this change I can take care of verifying all models, running tests and making the change everywhere...

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 #1

Updated by Jean-Baptiste Barth about 12 years ago

If you want to see what's involved, here are the two commits on my plugin : one, two (but please don't start me on the bad idea of monkey patching core classes, that's all I have now to accomplish this kind of change...)

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 #2

Updated by Etienne Massip about 12 years ago

Looks ok to me, should be marked as a deprecated usage in RoR, too bad it is not?

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 #3

Updated by Jean-Philippe Lang about 12 years ago

  • Target version set to 2.3.0

Agreed.

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 #4

Updated by Jean-Baptiste Barth about 12 years ago

  • Status changed from New to Resolved

Done in r10949. I left scopes in the same form they used before (some use Arel syntax, some use the rails 2 hash syntax) but I might dig into that later.

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 #5

Updated by Jean-Philippe Lang about 12 years ago

  • Status changed from Resolved to Closed

Jean-Baptiste Barth wrote:

Done in r10949. I left scopes in the same form they used before (some use Arel syntax, some use the rails 2 hash syntax) but I might dig into that later.

Thanks, scopes now use Arel BTW (r10950).

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