In a Rails form, how to add a multiselect dropdown?

Question

I have a Rails form which includes a dropdown as shown below:

    <%= f.select :facility_id, options_for_select(@entities.collect{ |e| [e.entity, e.entity] }, 1 ), {include_blank: '-Select-'}, { id: my_entity'} %>

I also have 2 more dropdowns similar to the one above.

I would like to make the above dropdown as a multiselect dropdown. How can I achieve that?

Please help!

Thanks

score 1 · Accepted Answer · answered Nov 07 '19 at 08:19

1

You may just need to add this to the tag { :multiple => true} like this

<%= f.select :facility_id, options_for_select(@entities.collect{ |e| [e.entity, e.entity] }, 1 ), {prompt: '-Select-', :multiple => true}, { id: my_entity'} %>

answered Nov 07 '19 at 08:19

Linh Nguyen

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That seems to work. Quick question though pls? How can I select multiple entries in this dropdown from the UI? – Biju Nov 07 '19 at 09:30
Using shift key or control key while select – Linh Nguyen Nov 07 '19 at 09:43
Thanks much. I made a syntax mistake and hence the I was not able to select multiple items. It's fixed now. Sorry about the dumb question. I have raised another related question here - https://stackoverflow.com/questions/58746270/in-rails-dropdown-how-to-display-all-column-names-from-a-model Would you mind taking a look please? Thanks much in advance! – Biju Nov 07 '19 at 10:04

score 0 · Answer 2 · answered Nov 07 '19 at 08:18

You can do it by adding multiple: true in select

Example:

<%= f.select :facility_id, options_for_select(@entities.collect{ |e| [e.entity, e.entity] }, 1 ), {include_blank: '-Select-'}, { id: my_entity'}, { :multiple => true, :size => 5 } %>

Reference: [1][2]

In a Rails form, how to add a multiselect dropdown?

2 Answers2