Ruby on Rails: Insert value into database based on user input?

Question

I have an address column, but I'm not using :address in my form, instead, I have

:street, :state, :city, :zip columns:

<%= form_for @user, :html => {:multipart => true} do |f| %>
    <%= f.label :street %>
    <%= f.text_field :street %>

    <%= f.label :state %>
    <%= f.text_field :state %>

    <%= f.label :city %>
    <%= f.text_field :city %>

    <%= f.label :zip %>
    <%= f.text_field :zip %>

    <%= f.submit %>
<% end %>

Because I don't have a field for :address, but I would like to compile the information in the form and still insert it into my database. For example

(12345 Maple St, Made City CA 90017 or maybe when I get more advanced, I'll use some gem to compile the given information and put into a correct address format.)

How do I do such a thing?

My controller looks something like this:

  def create
    @user = User.new(params[:user])
    if @user.save
        redirect_to @user, notice: "Successfully created."
    else
      render :action => 'edit'
    end
  end

replace your form column by all the entities you are using.

Benoît
– Benoît

2013-06-06 04:26:28 +00:00
Commented Jun 6, 2013 at 4:26 — Benoît
– Benoît, Commented Jun 6, 2013 at 4:26

usha · Accepted Answer · 2013-06-06 04:29:17Z

2

    def create
            address = [params[:user].delete(:street), params[:user].delete(:state), params[:user].delete(:city), params[:user].delete(:zip)].join(", ")
            @user = User.new(params[:user].merge(:address => address))
            if @user.save
                redirect_to @user, notice: "Successfully created."
            else
              render :action => 'edit'
            end
        end

answered Jun 6, 2013 at 4:29

usha

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2 Comments

hellomello Over a year ago

i'm still new, but why is it in the .delete() state?

usha Over a year ago

delete - deletes the key/value pair from the hash and returns the value

Gowri · Accepted Answer · 2013-06-06 05:11:26Z

1

Another option would be to do it in model

attr_accessor :street, :city, :state, :zip

before_create :concate_address_attrs

Edit:-

I feel before_save is better to use over before_create

before_save :concate_address_attrs

def concat_address_attrs
  self.address = [street, city, state, zip].join(", ")
end

edited Jun 6, 2013 at 5:11

Gowri

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answered Jun 6, 2013 at 4:32

usha

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2 Comments

usha Over a year ago

you can't expect these attributes to be present everytime the object is saved and i don't want to accidentally override address with empty

usha Over a year ago

Could you explain why you think before_save is better?

zeantsoi · Accepted Answer · 2013-06-06 05:22:13Z

Unless processing overhead is a major concern, you're breaking Rails' DRY principles by saving concatenated model attributes as a separate attribute.

The Rails Way of accomplishing this would be to create a model convenience method that concatenates existing attributes into a pseudo-address attribute without requiring any additional attributes be committed to the database:

# my_model.rb
def address
    [street, city, state, zip].join(', ')
end

# my_view.html.erb
<%= @user.address %>

Alternatively, if you only need the full address for display in your views, you might consider using a view helper:

# app/helpers/my_model_helper.rb
module MyModelHelper
    def formatted_address(address)
        [address.street, address.city, address.state, address.zip].join(', ')
    end
end

# my_view.html.erb
<%= formatted_address(@address) %>

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