Multiple values for collection_select

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I am trying to have the following HTML code in my form:

 <select name="user[language_ids][]">
    <option value="">Please select</option>
    <option value="1" selected="selected">English</option>
    <option value="2">Spanish</option>
  </select>

  <select name="user[language_ids][]">
    <option value="">Please select</option>
    <option value="1" selected="selected">English</option>
    <option value="2">Spanish</option>
  </select>

To allow the User to select two languages when he signs up.

I have tried with this:

<%= f.label :languages %>
<%= f.collection_select(:language_ids, Language.all, :id, :name) %>
<%= f.collection_select(:language_ids, Language.all, :id, :name) %>

And also with this:

<%= f.label :languages %>
<%= f.collection_select(:language_ids[], Language.all, :id, :name) %>
<%= f.collection_select(:language_ids[], Language.all, :id, :name) %>

After revieweing the answers, I have tried with this:

<%= collection_select(:user, :language_ids, Language.all, :id, :name, {}, {:name => 'user[language_ids][]' }) %>
    <%= collection_select(:user, :language_ids, Language.all, :id, :name, {}, {:name => 'user[language_ids][]' }) %>

But the problem here is that both of the selects have the same ID and also, they are not associated with the form builder f

Any thoughts on the best way to do so?

Try,

<%= f.collection_select(:language_ids, Language.all, :id, :name,{}, {:multiple => true}) %>

How to send multiple values to controller using :with option of , Hi, Thank u all for replying my previous posts. I have following problem I want to send multiple selected values from collection_select using� The :value_method and :text_method parameters are methods to be called on each member of collection. The return values are used as the value attribute and contents of each <option> tag, respectively. They can also be any object that responds to call, such as a proc, that will be called for each member of the collection to retrieve the value/text.

You can create a collection of fields by using fields_for. The two select will have the same id but collection_select takes an optional hash containings html options where you can set a custom id.

<%= f.fields_for :language_ids do |language| %>
  <%= language.collection_select(nil, Language.all, :id, :name,
        {include_blank: "Please select", selected: 1},
        {id: :user_language_id_1}) %>
  <%= language.collection_select(nil, Language.all, :id, :name,
        {include_blank: "Please select", selected: 1},
        {id: :user_language_id_2}) %>
<% end %>

generates the following output:

<select id="user_language_id_1" name="user[language_ids][]">
  <option value="">Please select</option>
  <option value="1" selected="selected">English</option>
  <option value="2">Spanish</option>
</select>

<select id="user_language_id_2" name="user[language_ids][]">
  <option value="">Please select</option>
  <option value="1" selected="selected">English</option>
  <option value="2">Spanish</option>
</select>

The 'method' in collection_select - DEV, When using a form helper for choosing an option (or multiple Because collection_select is only allowing us to choose one pet, the value of� Select is a LINQ functionality to define a data format of the query results. Each of the examples is presented in C# with both Lambda and Query expression.

Collection_select: What the heck? | by Theresa Morelli, Enter Ruby on Rails's collection_select form helper. It generates an HTTP tag and tags that render a dropdown menu with multiple options (Note: the helper… value_method becomes the value attribute of each option tag. Specifies the value of the projected field. Starting in MongoDB 4.4, with the use of aggregation expressions and syntax, including the use of literals and aggregation variables, you can project new fields or project existing fields with new values. For example,

You should be able to do something like this:

<%= f.label :languages %>
<%= f.collection_select(:language_ids, Language.all, :id, :name, {}, {id => "language_1", :name => "user[language_ids][]"}) %>
<%= f.collection_select(:language_ids, Language.all, :id, :name, {}, {id => "language_2", :name => "user[language_ids][]"}) %>

select_tag (ActionView::Helpers::FormTagHelper), Creates a dropdown selection box, or if the :multiple option is set to true, : prompt - Create a prompt option with blank value and the text asking user to select� In PowerApps, I can create a collection of an entire Sharepoint list (all columns) as below: Collect(colWhatever, TheListName) But I cannot figure out how to specify just the 2-columns that I need in from the list, like: Collect(colWhatever, TheListName.Column1, TheListName.Column1) Thanks

Basically sending 2 (or more) fields with the same attribute doesn't work, because params will be turned into a hash : {language_ids: [1], language_ids: [2]} and since you have the same key the last one will override the previous one(s).

{a: 1, a: 2}[:a] #=> 2

To circumvent this problem you need to to create different attributes and then concatenate them in one. For this you'll need facade attributes in your model :

class Language
  attr_writer :language_one_id, :language_two_id

  before_save :gather_languages

  def gather_languages
    self.language_ids= [language_one_id, language_two_id]
  end

  # for the form to display chosen lang (idem with two)
  def language_id
    language_ids.first
  end
end

# view/_form
=f.select :language_one_id, Language.all.map {|l| [l.name, l.id]}
=f.select :language_two_id, Language.all.map {|l| [l.name, l.id]}

But frankly I think you're making your life harder by going against conventions here (I'd use checkboxes instead).

collection_select (ActionView::Helpers::FormOptionsHelper), Returns <select> and <option> tags for the collection of existing return values of method for object's class. The value returned from calling method on the� Hi anjali2111993, Can you be more specific while asking something that you are trying to explore in Blue Prism. Okay let's get in to the picture. According to my understanding, col1 value can be extracted from a collection by using "collectionname.column_name" and store that value in a data item(use this in expression editor of calc stage), if you use this syntax in between a Loop stage then

If you want to store multiple values (a collection), select Allow multiple values. For record variables, select the object whose record values you plan to store. Identify the variable’s availability outside the flow. Store Information in a Flow Variable

If you want multiple options to be selected by default you can pass an array of values as “selected” option. It should be obvious, but odradek’s and batarski’s notes can confuse somebody in this case.

Right click on a movie (or multiple) and select Move to other collection. Select the collection you wish to move it/them in. The option to move to other collection only appears if you have multiple collections (so use File > Manage Collections to create an extra collection first).

Comments
  • Are you seeing the ids of the languages instead of their names in show.html.erb?
  • How do the select fields relate to the model?
  • I don't want multiple, I want several selects...Thanks though
  • Not the right answer for the question, but the right answer for mine, so thanks!
  • This is just another way of doing a collection_select. Doesn't solve the authors question