Create a select tag and a series of contained option tags for the provided object and method.

The option currently held by the object will be selected, provided that the object is available. This can be used to provide a default set of options in the standard way: Usually this model is not saved to the database. Instead, a second model object is created when the create request is received.

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This allows the user to submit a form page more than once with the expected results of creating multiple records. In addition, this allows a single partial to be used to generate form inputs for both edit and create forms.

Similarly, you can specify values to be disabled in the option tags by specifying the: This can either be a single value or an array of values to be disabled. A block can be passed to select to customize how the options tags will be rendered.

Ruby on Rails form_for select field with class - Stack Overflow

This is useful when the options tag has complex attributes. The HTML specification says when multiple parameter passed to select and all options got deselected web browsers do not send any value to server.

Unfortunately this introduces a gotcha: So, any mass-assignment idiom like.

To prevent this the helper generates an auxiliary hidden field before every multiple select. The hidden field has the same name as multiple select and blank value.

The client either sends only the hidden field representing the deselected multiple select box , or both fields. This means that the resulting array always contains a blank string.

Useful if there is not a default value required for the select element. The main difference is that if the select already has a value, then: It is not recommended to have excessive code in the views. You should refactor your code a bit. If you have to do this often, you should define a FormBuilder extension, so you get methods like f. IMO, most projects should have a custom form builder anyway, so the addition would be very small. Sometimes you need use select not only with object as by default.

For example if you have helper method like:.

text_field (ActionView::Helpers::FormHelper) - APIdock

In the new modelname page, I have a drop down menu that lists all the manufacturers, so I choose eg Dell, and then in modelname. To create that drop down I used:. The object is referenced internally when you call f. And if that form is submitted, the browser also seems to not send anything about it to the server.

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So, any mass-assignment idiom like user. Register or log in to add new notes. RobinWu - July 4, Add empty option and text is -select- select: Mange - January 8, Refactoring excessive code for selects garg: Using custom object via: For example if you have helper method like: The options has parameter: To create that drop down I used: NikhilT - March 27, You could pass a range as the choices parameter select: Welcome Register Projects Help About Blog APIdock release: Flowdock - Team Inbox With Chat for Software Developers Check out how the team behind APIdock connects Pivotal Tracker , GitHub and group chat to one workflow.