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Disable autopopulation of select fields with database values ​​in rails 4 change form

I'm running Rails 4.1 and I have an edit form with some values ​​in it, I don't mind other fields in the form, autopopulation from database values, Rails does it well. But I want to disable autopopulation of one field. Is it possible?

I'm doing the standard Rails form_for, everything works, I just don't want one of the fields to be autopopulated. I don't want the value to be empty or "" because it was overwriting the database.

Any suggestions?

edit.html.erb

<%= form_for @object do |f| %>
  <% f.text_field :property %>  #autopopulate from database
  <% f.text_field :property2 %> # I do not want to autopopulate.
  <% f.submit 'Submit %> 
<% end %>
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1 answer


Clear attribute before rendering the form.

This is what it would look like in the view:

<% @object.property2.clear %>   # set attribute to an empty string
<%= form_for @object do |f| %>
  <% f.text_field :property %>  #autopopulate from database
  <% f.text_field :property2 %> # I do not want to autopopulate.
  <% f.submit 'Submit %> 
<% end %>


However, it's best to do this in a controller:

def edit
  # ...
  @object.property2.clear
end

Please note, if you submit this form with a blank field, it will save the blank line in the database, deleting everything that came before.

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