Show array as checkboxes

Question

I have this form:

<%= form_for @user, url: admin_user_path(@user.id) do |f| %>
      <%= f.label :first_name %>
      <%= f.text_field :first_name %>
      <br>
      <%= f.label :last_name %>
      <%= f.text_field :last_name %>
      <br>
      <%= f.label :tags %>
      <%= f.text_field :tags_string %> 
      <%= f.submit "update", placeholder: "Update" %>
<% end %>

@user.tags is an array of strings, with possible ["A","B","C"] as possible tags. Some users have one, some have all of them...etc.

Being tags_string a method which converts tags in a string for having the user editing the form to change it if desired.

However, this is error prone, and I want the user to have the ability to chose between all possible tags having them in checkboxes.

What would I need to do in order to achieve this?

Thanks.

David Routen · Accepted Answer · 2015-06-15 18:23:50Z

1

I'd first recommend using simple_form (git:plataformatec/simple_form) instead of form_for which will make this much easier for you!

You can write the form as:

<%= simple_form_for @user, url: admin_user_path(@user.id) do |f| %>
  <%= f.input :first_name %>
  <%= f.input :last_name %>
  <%= f.input :tags_string, as: :check_boxes, collection: ['A', 'B', 'C'] %> 
  <%= f.button :submit, value: 'Update' %>
<% end %>

Voila, you are all set! Are you serializing the array of tags or is Tag a model that has_many Users?

answered Jun 15, 2015 at 18:23

David Routen

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4 Comments

borjagvo Over a year ago

Sorry, I forgot to mention that I'm using Mongoid. That doesn't allow me to use simple_form: stackoverflow.com/questions/9755726/…

David Routen Over a year ago

Gotcha, then you can just use the collection_check_boxes() method inside the form_for! I'd use it like: <%= collection_check_boxes(:tags_string, #method, TagsStrings.all, :id, :name) %>

David Routen Over a year ago

:tags_strings would work if TagsString is a model and User has_many :tags_strings but I'd need to know more about how the connection is set up (like I mentioned before, serialized array vs. related models) to give you a more exact answer.

borjagvo Over a year ago

: tags_strings is a method in User collection, returning the user tags as a string: ["A","B","C"] -> "A,B,C".

Gurudath BN · Accepted Answer · 2015-06-15 19:01:25Z

0

You can probably loop possible tags and show the check-box for each tag. Your modified code looks like:-

  <% @user.tags.each do |tag| %>
        <%= check_box_tag 'tags_string[]', tag.name -%>
        <%= tag.name -%>
  <% end %>

Documentation reference for showing checked or not and other options available:- http://apidock.com/rails/ActionView/Helpers/FormTagHelper/check_box_tag

edited Jun 15, 2015 at 19:01

answered Jun 15, 2015 at 18:52

Gurudath BN

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