On Jan 7, 11:39 am, Colin Law <[email protected]> wrote:
> I have always assumed that when using form_for in erb one should use
> <%= form_for ..... %>
> However having done some tests it appears that it works identically
> without the '=' so
> <% form_for ... %> is ok.
>
> Can anyone explain this?  I thought that without the '=' the code
> would be run but the result would not be injected into the html.  I
> appear to be wrong however.

if you use <%= then when erb compiles your template it automatically
appends the result of the expression to its output buffer.
If you use <% then you can still call concat to do that yourself. This
was a bit confusing - in rails 3 you use <%= for form_for and for
similar helpers that do actually insert content right there

Fred
>
> Colin

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