rails select tag with multiple values pre selected

Question

I am trying to have a multiple select box. select box will contain all the stores in the DB but the ones that the user belongs to will be selected.

I'm half way there. I got a select box which has all the stores in the database. I'm unable to select the ones that the user belongs to.

I have the following:

<%= select_tag 'stores[]', options_for_select(@stores.map {|s| [s.store_name, s.store_id]}, 
:selected => @user.stores.map {|j| [j.store_name, j.store_id]}), :multiple => true, :size => 
10 %>

I have a map with stores that a user belongs to. it is in:

@user.stores

Sikandar Tariq · Accepted Answer · 2018-09-19 06:02:50Z

63

after a fair amount of trial and error the following worked for me:

<%= select_tag 'stores[]', options_for_select(@stores.map { |s| [s.store_name, s.store_id] }, @user.stores.pluck(:id)), multiple: true, size: 10 %>

edited Sep 19, 2018 at 6:02

Sikandar Tariq

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answered Feb 4, 2010 at 0:21

Omnipresent

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2 Comments

Squadrons Over a year ago

FYi, just a tiny spacesave/nice Ruby - you can shorten the selected option from @user.stores.map {|j| j.store_id } to @user.stores.map(&:store_id)

Leo Gasparrini Over a year ago

Thanks bro! But I think that you can use @user.store_ids instead pluck

Michael Yagudaev · Accepted Answer · 2015-01-20 05:10:39Z

16

Another way of doing this would be to use the options_from_collection_for_select helper method. It will look something like this:

<%= select_tag 'stores[]', options_from_collection_for_select(@stores, :store_id, :store_name, [4,5,6]), multiple: true, size: '10%' %>

edited Jan 20, 2015 at 5:10

answered Apr 30, 2013 at 21:04

Michael Yagudaev

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2 Comments

gosukiwi Over a year ago

I don't know if this was available when the question was asked but this should be the approved answer IMO.

Karthik T Over a year ago

My pleasure @yagudaev. I was dissapointed that the list of selected entries requires to be ids and the :store_id cannot be applied to it :(

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