how does rails know if it should submit a form to update or create?

[fugee ohu]

how does rails know if it should submit a form to update or create? the form is rendered by either new or edit so on submission how does rails know which action originally rendered the form?

[nanaya]

by checking the value returned by `object.persisted?`.

[Colin Law]

Have a look at the html for the edit and new pages and I think you
will see a difference. Look at the form tag in particular.

Colin

[fugee ohu]

they're the same, <%= render 'form' %> is all they contain other than links and either  <h1>New model</h1> or <h1>Editing model</h1>

[Colin Law]

On 26 Dec 2015 22:35, "fugee ohu" <fuge...@gmail.com> wrote:
>
> they're the same, <%= render 'form' %> is all they contain other than links and either  <h1>New model</h1> or <h1>Editing model</h1>

I said to look at the HTML not your source code.  The form tag is the HTML generated by the form_for code.

Also please don't top post, as I have asked before. Thanks.

Colin

>
> On Friday, December 25, 2015 at 4:14:36 AM UTC-5, Colin Law wrote:
>>
>> On 25 December 2015 at 07:16, fugee ohu <fuge...@gmail.com> wrote:
>> > how does rails know if it should submit a form to update or create? the form
>> > is rendered by either new or edit so on submission how does rails know which
>> > action originally rendered the form?
>>
>> Have a look at the html for the edit and new pages and I think you
>> will see a difference.  Look at the form tag in particular.
>>
>> Colin
>

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