TAGS:

Postgres  Mysql  Column  Array  Rails

How To Access And Traverse Array Fields In Views In Rails

In our example, We suppose that you watched our tutorials about rails application with postgres database or rails application with Mysql database and adding column type array to postgres table via migration only and adding column type array to postgres table via model and migration and adding column type array to mysql table.

Then, You must add the fields or columns into permited params in our example reader and editor in the bottom of its controller, in our example PostsController as:

def post_params
      params.require(:post).permit(:name, :comment,:reader,:editor)
    end

Then, Edit the show page to be like:

<p id="notice"><%= notice %></p>

<p>
  <strong>Name:</strong>
  <%= @post.name %>
</p>

<p>
  <strong>Comment:</strong>
  <%= @post.comment %>
</p>
<p>
  <strong>Readers:</strong>
  
  <ol>
  	<% @post.reader.each do |reader| %>
  		<li><%= reader %></li>
  	<% end %>
  </ol>
</p>
<p>
  <strong>Editors:</strong>
  <ol>
  	<% @post.editor.each do |editor| %>
  		<li><%= editor %></li>
  	<% end %>
  </ol>
</p>

<%= link_to 'Edit', edit_post_path(@post) %> |
<%= link_to 'Back', posts_path %>

Note, You can use full array functions in ruby with the reader and editor fields.

Now, Take a look to this tutorial video.