Can scaffold generate listboxes in views? I've been unsucces

I’ve created several different Rails applications but I’m running
into the same trouble with each one. Lets say I create an app called
Test. I type ‘rails test’ and it generates the directory for me.
Now I edit my database.yml file. Then I create a database with
Postgresql by typing createdb test. Now I go into Postgresql by
typing ‘psql test’.

Here are my tables:

CREATE TABLE topics (
id SERIAL PRIMARY KEY,
name VARCHAR(100) NOT NULL
);

CREATE TABLE blogs (
id SERIAL PRIMARY KEY,
title VARCHAR(100) NOT NULL,
topic_id INTEGER NOT NULL REFERENCES topics(id),
content TEXT NOT NULL
);

Next, back in the test folder, I type ‘script/generate scaffold Topic
Topic’. This creates my topic pages. So far, so good. Next, I type
‘script/generate scaffold Blog Blog’. This creates my blog pages.
When I go to view the blog pages at localhost:3000/blog, the only
fields showing up on my page are the title and content. Why isn’t
the topic_id list box displayed?

I know I’ve gotten it to work once or twice but I don’t think I’m
leaving out any steps, am I?


Jeff Self
Mac OS X (Apple Styling, Unix Power)

On Dec 17, 2005, at 2:21 PM, Jeff Self wrote:

id SERIAL PRIMARY KEY,
Next, back in the test folder, I type 'script/generate scaffold

Jeff Self
Mac OS X (Apple Styling, Unix Power)

Jeff-

Scaffolding is not smart enough to handle relationships like that.

You have to set that part up manually.

Cheers-
-Ezra Z.
WebMaster
Yakima Herald-Republic Newspaper
[email protected]
509-577-7732

On Sunday 18 December 2005 05:54, Nic W. wrote:

   </option>

<% end %>

I don’t know really where you’re stuck, some little more direction
would better. This is to get you started, but is definitely not the
DRY way.

  • Nic.

A slightly shorter way to do:

<%= select :blog, :topic_id, Topics.find(:all).map{ |t| [t.name, t.id]}
%>

quite violating the MVC architecture, so a cleaner way would be to
compute the
Topics list in the controller as you did.

Francois

I’m still new, and my syntax is probably off, but it is happening
because of your foreign key reference. Don’t forget to set your
assocations in the model, the ‘has_many’ and ‘belongs_to’. Once this
is done, you can access the value by: blog.topic:

For example, just to make the drop-down appear under ‘Show’ when you
click on a particular blog (this should be done w/partials and such
really)

Edit your Controller for blogs, and add a line like this under Show:
@topics= Topics.find_all

Test it out by editing show.rhtml for blogs and adding a line like this:

Topic

<% @topics.each do |topic| %> > <%= topic.name %> <% end %>

I don’t know really where you’re stuck, some little more direction
would better. This is to get you started, but is definitely not the
DRY way.

  • Nic.

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