[LRUG] How does Rails decide how to parse ambiguous dates?

[Liam McAndrew]

John,

I believe the clue is to look here:
http://apidock.com/rails/ActiveRecord/AttributeMethods/read_attribute

View the source and note the 'column.type_cast' line...

http://apidock.com/rails/ActiveRecord/ConnectionAdapters/Column/type_cast

Again view the source, the case statement refers to the 'type' attribute,
which is actually an instance variable for the 'simplified_type' method...

http://apidock.com/rails/ActiveRecord/ConnectionAdapters/Column/simplified_type

And that's where the magic appears to happen!

Liam.

On Tue, Jul 26, 2011 at 4:39 PM, John Winters <john at sinodun.org.uk> wrote:

> On 26/07/11 16:07, John Winters wrote:
> [snip]
>
>> def read_attribute_before_type_**cast(attr_name)
>> @attributes[attr_name]
>> end
>>
>> Unless I've missed it somewhere, no formatting at all occurs.
>>
>
> I'm back to my earlier view that no formatting occurs in the field handling
> code, but there is some sort of conversion happening in ActiveRecord and I'm
> at a loss as to where.
>
> I have a model called an era, and it has a Date field called starts_at.
>  I've fire up the console and get the following (prompt shortened for
> clarity):
>
> > era.starts_at.class
>  => Date
> > era.attributes["starts_at"].**class
>  => Date
> > era.read_attribute_before_**type_cast("starts_at").class
>  => String
>
> Now where did that conversion occur?
>
> John
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