| Commit message (Collapse) | Author | Age | Files | Lines |
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This moves a bit more of the logic required for dirty checking into the
attribute objects. I had hoped to remove the `with_value_from_database`
stuff, but unfortunately just calling `dup` on the attribute objects
isn't enough, since the values might contain deeply nested data
structures. I think this can be cleaned up further.
This makes most dirty checking become lazy, and reduces the number of
object allocations and amount of CPU time when assigning a value. This
opens the door (but doesn't quite finish) to improving the performance
of writes to a place comparable to 4.1
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Timestamp column can have less precision than ruby timestamp
In result in how big a fraction of a second can be stored in the
database.
m = Model.create!
m.created_at.usec == m.reload.created_at.usec
# => false
# due to different seconds precision in Time.now and database column
If the precision is low enough, (mysql default is 0, so it is always low
enough by default) the value changes when model is reloaded from the
database. This patch fixes that issue ensuring that any timestamp
assigned as an attribute is converted to column precision under the
attribute.
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Any tests for a type which is not overridden by Active Record, and does
not test the specifics of the attributes API interacting in more complex
ways have no reason to be in the Active Record suite. Doing this
revealed that the implementation of the date and time types in AM was
actually completely broken, and incapable of returning any value other
than `nil`.
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We do not need to require each file from AM individually, the type
module does that for us. Even if the classes are extremely small right
now, I'd rather keep any custom classes needed by AR in their own files,
as they can easily have more complex changes in the future.
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The first step of bringing typecasting to ActiveModel
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