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Ruby on Rails Cheatsheets
Form Helpers Cheatsheet
Create forms, check boxes, radio buttons, select lists and more using Rails' built-in form helpers.
- Example - controller, view, HTML and params[]
- fields_for - creates a scope around fields
- Multipart form - model and view of multipart form
- Input field helpers - check boxes, text fields, radio buttons
- RESTful form_for - using form_for in a RESTful context
- form_for - wrap ActiveRecord model objects in a form
- Parsing form data - how Rails parses incoming form data
RESTful form_for
When standard routes are used in a RESTful context, Rails will reflect upon the object passed to it and automatically build a form with the relevant RESTful URL depending on whether the form is wrapping a new record (create) or an existing record (update). Nested routes will require you to be more verbose. Standard routes
|
Standard routes |
new record? |
method |
URL |
|
|
yes |
POST |
|
|
|
no |
PUT |
|
|
Nested routes |
new record? |
method |
URL |
|
|
yes |
POST |
|
|
|
no |
PUT |
|
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RELATED ARTICLE
Quickly debugging form helpers
Sometimes you want to quickly see the output of helper methods, and constantly clicking refresh in your browser then viewing the page source can be tiresome. Instead, use the Rails console to check helpers are doing what you want them to. More
