Mojolicious: prefilling an email field with a Perl expression
I am acquiring knowledge with Mojolicious templates and forms, that are obtained viaMojolicious::Plugin::TagHelpers.
The problem I was facing, that I’ve reported (and solved by myself) in this forum thread, was about pre-filling an email input field with data coming from the underlying model.
My first attempt was:
%= email_field 'email' => <%= $user && $user->is_logged_in ? $user->email : '' %>, id => 'email', class => 'form-control'
where, clearly,
$user is the model.
This approach was wrong, since it was producing an HTML like the following:
<input name="email" type="email" value="foo@bar.com">, id => 'email', class => 'form-control' %>
that clearly was poorly formatted with all the extra attributes outside of the
input HTML tag.
The idea came to me after reasoning about the starting tag %=: this is a Perl expression line starter, and therefore everything that follows is managed as a Perl expression, as for instance the fat comma.
Therefore, the right solution is to let the expressio to parse a Perl piece of code:
%= email_field 'email' => ( $user && $user->is_logged_in ? $user->email : '' ), id => 'email', class => 'form-control'
that correctly produces the HTML that follows:
<input class="form-control" id="email" name="email" type="email" value="foo@bar.com">