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

Rails
1

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?

2

On Fri, Dec 25, 2015, at 16:16, fugee ohu 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?

by checking the value returned by object.persisted?.

3

they’re the same, <%= render ‘form’ %> is all they contain other than
links
and either

New model

or

Editing model

4

On 25 December 2015 at 07:16, fugee ohu [email protected] 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

5

On 26 Dec 2015 22:35, “fugee ohu” [email protected] wrote:

they’re the same, <%= render ‘form’ %> is all they contain other than
links and either

New model

or

Editing model

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 L. wrote:

On 25 December 2015 at 07:16, fugee ohu [email protected] 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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