Consider this scenario in relation to a blog posting application.
- a form has been loaded for a user to create a new blog entry
- attributes are: title, content, category and sub-category
-user goes ahead and fills in text to the title and content
- user selects an option from the drop down (select) box
representing the 'category' attribute. Possible values are:
"politics", "finance" and "entertainment".
- upon selecting a category value, the "sub-category" attribute's
drop down (select) should be populated.
For example, if a user selects "politics", the sub-categories that
can be selected are: "US,AU,NZ" whilst when "finance" is selected,
the sub-categories that can be selected are: "mining", "bonds" and
"interest rates" and when "entertainment" is selected as a category,
the sub-categories that can be selected are: "sports", "music" and
I know that the scenario above would have Ajax as its' solution.
attribute is to be used on the category select box. When the value
changes, an Ajax request is made to the necessary controller and the
controller will return the sub-category values of the selected
Has anyone got a link to a good tute I can look at? I read the rails
books i have but I can't find anything similar to this.