Hi
I'm trying to implement multi-model forms. Specifically a form
containing the following relationships ...
parent -> children
child -> grandchildren
[ NOTE : "->" denotes a one to many relationship / association
-
the '>' points to the many ]
Recipe #13 in Advanced Rails Recipes does a great job of explaining
how to implement the parent -> children relationship using Project
and Tasks. Specifically ...
project -> tasks (using my "->" nomenclature)
I'd like to include an additional model - for example adding
"Participants" to the above example ...
project -> tasks
task -> participants
Where I'm getting stuck is what to use for the 'prefix' (using the
terminology of Recipe #13) - or what name to use to refer to
'participants', in such a way that the params hash is properly
populated for 'auto-population' by the controller?
Using the Project/Task metaphor and extending it to include the
relationship that a Task has many Participants, the 'task' partial
would look something like this (not in its final form - but early on
in the development of a +2 model multi-model form. Also note the
'??????') ...
<div class="task">
<% fields_for "project[task_attributes][]", task do |f| %>
<p>
Task: <%= f.text_field :name %>
</p>
<% 3.times { task.participants.build } %>
<% for participant in task.participants %>
<% fields_for "project[???????]", participant do
|p_form| %>
<p>
Participant Name: <%= p_form.text_field
:name %>
</p>
<% end %>
<% end %>
<% end %>
</div>
I'm assuming that a Task can have at most 3 participants, like what
was done in the early iterations of Ryan Bate's original screen-cast.
I'm trying to figure out how to name the 'grandchildren' such that
the params hash is correctly populated ? Specifically - what to put
in place of the '?????' in this line ...
<% fields_for "project[???????]", participant do |p_form| %>
If the solution doesn't involve replacing the '??????' above -
please point me in the right direction by providing as much detail /
info as you have time for.
I'm grateful for any help / guidance you can provide.
Thanks
Dave
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