NoMethodError in Admin::Pages#new

[beydogan]

I'm getting undefined method `content' for Page error when I do following;

• I go to /admin
• I click Pages > New Custom Page on left navbar.

undefined method `content' for #<Page:0x007f95cb36ceb0>

        <div class="form-group">
          <%= f.text_area :content, placeholder: "Page content goes here...", class: "textarea"%>
          <script type="text/javascript">
            $('.textarea').wysihtml5({toolbar: { color: true } });
          </script>

[peyloride]

Because of mine fault. Changed the migration file, didn't add new one.