I had two select boxes inside a HTML form, selecting one updates the values in the other select box.  I used Ajax and a server side call to do this updation, which works fine.  But when I submit the form, the new select tag is missing in the form parameters.

If you run into a situation like this, the answer may lie in your HTML form.

My code did something like this:

<table>
  <form>
    <tr>
      <td>
        <div id="foo">
        </div>
      </td>
    </tr>
   </form>
</table>

Notice the <form> inside the <table>?  That was the culprit.

Chrome developer console dumped this message which helped.

Once I flipped the order and moved the <form> to encapsulate the <table>, that fixed the bug .

Share on Facebook

No related posts.

1) Install rails

sudo gem install rails --pre

2) Install rails upgrade helper plugin

rails plugin install git://github.com/rails/rails_upgrade.git
script/plugin install git://github.com/rails/rails_upgrade.git
/Library/Ruby/Site/1.8/rubygems.rb:233:in `activate': can't activate rails (= 2.3.8, runtime) for [], already activated rails-3.0.0.beta4 for [] (Gem::LoadError)

Couldn’t proceed with that error. At this point, after spending an hour, I gave up on trying to move my existing Rails2.x app as is to Rails3 since it is clear that the boot process is different for Rails3 and keeping the existing boot.rb etc will create more chaos.

3) Create a new rails 3.0.0 application

rails new app_30
cd app_30

Copy over app/controllers, app/views, app/lib, app/models, config/database.yml from old to new

4) Start server script/rails server (script/server won’t work)

5) Add gem ‘mysql’, ’2.8.1′ to gemfile

6) Set the root correctly in routes.rb file. For some reason it doesn’t find default controller.

root :to => "nav#index"

7) Install all the missing gems and add them to gemfile with appropriate versions, if need be. If you have legacy plugins, the newer gems don’t seem to work correctly, stick to the legacy plugins and move them over to the new app.

paginate_by_sql breaks since add_limit! is removed from ActiveRecord::Base. Fix paginate by sql to do this:

module ActiveRecord
class Base
  def self.find_by_sql_with_limit(sql, offset, limit)
   sql = sanitize_sql(sql)
   find_by_sql(sql + " LIMIT #{offset},#{limit}")
  end

  def self.count_by_sql_wrapping_select_query(sql)
     sql = sanitize_sql(sql)
   count_by_sql("select count(*) from (#{sql}) as x")
  end
end
end

9) Add the following two routes to routes.rb. Without these two routes /controller/action is not recognized by default.

# Install the default route as the lowest priority.

map.connect ':controller/:action/:id.:format'

map.connect ':controller/:action/:id'

10) ActionDispatch::Cookies::CookieOverflow error. Set your session_store to be active_record_store. Change this in config/initializers/session_store.rb

Rails.application.config.session_store :active_record_store, :key => '_mygreatapp_30_session'

11) Rails generated HTML tags are HTML escaped by default. So if you did something like

<%=link_to “&nbsp;foobar” … %>, the &nbsp; would be escaped and represented literally on screen.

Likewise, if you had code that did

<%= getImage %> and getImage helper returned “<a href=”…”><img src=””/></a>, the returned string would be escaped. Use <%= image_tag(getImage) %> and change the getImage to return just the image path.

12) If you are sure that the code is returning safe HTML, then do this:

<%= helper_returning_html.html_safe %>

or

<%= raw helper_returning_html %>

Share on Facebook

No related posts.

http://blog.anands.net is now the unified blog URL and http://textblog.anands.net mirrors it. None of you have to change or update any of the RSS feeds, they should work automagically.

Getting this to work without breaking (any more) of the existing clients and permalinks out there was fun. I learned way more about WordPress than I ever needed to . I have a couple of blog entries on how to migrate from PixelPost to WordPress and how to move WordPress from one sub-domain to another.

Sorry for any of the duplicate posts in your RSS feeds, I could have avoided them with a little bit more careful planning, but I wasn’t thinking it through.

Share on Facebook

Related posts:

1. Blog changes I have had two blogs, a photoblog at http://blog.anands.net running...

Of course, they allow only one blog RSS. In the simplest case, I have 3 RSS feeds, one for my photo blog and two for this blog [entries and comments]. I added my photo blog first – then changed my mind and added my text blog next. I wasn’t sure which of the two blogs I want to link to my account.

I wasn’t satisfied with this setup, so I wrote a Yahoo Pipe to link these 3 RSS feeds into one and used the RSS feed of the Pipe in my facebook profile.

Now, I didn’t realize two things.

a) Facebook’s RSS aggregation is stupid. Instead of fetching the last 20 [or 10] results alone, it fetches all the entries from your blogs the minute you add them.

b) They don’t really think that anyone would have more than one blog and if they did, they would have to experiment till they get it right.

So I got a warning message in facebook saying that my actions were in ‘violation’ of facebook’s terms of use and my account might be disabled.

Of course, I was curious enough to find out what the heck I did wrong, so I hit the ‘Notes’ page in my facebook profile.

Now I get a nice popup which says my Notes is blocked and the block will be removed whenever they deem fit. That dialog had a link to go back to the home page and a ‘Close’ button.

Of course, I hit the ‘Close’ button and I saw that my notes page was intact.

I should have probably left it there so that only my notes page was blocked but my profile wasn’t.

Of course I didn’t.

I tried to delete a note. I wanted to see if there is a way to delete all my notes and unblock my note page .

That caused facebook to log me out and disable my account.

So much for that new feature.

If anyone knows how to get back into facebook, let me know

Share on Facebook

No related posts.

Check it out.

Share on Facebook

No related posts.

Share on Facebook

No related posts.

undefined method `server_settings=’ for ActionMailer::Base:Class (NoMethodError)

server_settings has been renamed to smtp_settings

Change your environment.rb to:

config.action_mailer.smtp_settings = {
….
}

That fixed the problem.

Share on Facebook

No related posts.

Share on Facebook

No related posts.