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POrails: Can't mass-assign protected attributes
 

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    <p>This seems to be a common error, and I've read many replies. I must be missing something dumb.</p> <p>I have an activity with one location. (Has_one). I've set accepts_nested_attributes_for :location, I believe I have the singular/plural right (all singular, it's a has_one relationship). (I have tried listing the attr_accessible for each attribute individually, no dice.) I have restarted my server. yet, I keep getting:</p> <blockquote> <p>Can't mass-assign protected attributes: address, location_name, phone_number, district, postcode, city, country, lat,</p> </blockquote> <pre><code>class Activity &lt; ActiveRecord::Base attr_accessible :beer, :user, :whatdoing, :where, :with, :location_id, :location_attributes has_one :location, :dependent =&gt; :destroy accepts_nested_attributes_for :location validates :whatdoing, :numericality =&gt; { :only_integer =&gt; true, :greater_than =&gt; -1} end class Location &lt; ActiveRecord::Base validates_presence_of :address belongs_to :activity end </code></pre> <p><strong>Activity Controller:</strong></p> <pre><code># GET /activities/new.json def new @activity = Activity.new @activity.build_location respond_to do |format| format.html # new.html.erb format.json { render json: @activity } end end # PUT /activities/1 # PUT /activities/1.json def update @activity = Activity.find(params[:id]) respond_to do |format| if @activity.update_attributes(params[:activity]) format.html { redirect_to @activity, notice: 'Activity was successfully updated.' } format.json { head :no_content } else format.html { render action: "edit" } format.json { render json: @activity.errors, status: :unprocessable_entity } end end end </code></pre> <p>It must be something simple, but I can't spot it. </p> <p>Thanks in advance!</p> <p>Adding related form code:</p> <pre><code>&lt;%= form_for(@activity) do |activity_form| %&gt; &lt;% if @activity.errors.any? %&gt; &lt;div id="error_explanation"&gt; &lt;h2&gt;&lt;%= pluralize(@activity.errors.count, "error") %&gt; prohibited this activity from being saved:&lt;/h2&gt; &lt;ul&gt; &lt;% @activity.errors.full_messages.each do |msg| %&gt; &lt;li&gt;&lt;%= msg %&gt;&lt;/li&gt; &lt;% end %&gt; &lt;/ul&gt; &lt;/div&gt; &lt;% end %&gt; &lt;div class="field"&gt; &lt;%= activity_form.label :whatdoing, "Thinkin" %&gt; &lt;%= activity_form.radio_button :whatdoing, 0 %&gt; &lt;%= activity_form.label :whatdoing, "Drinkin" %&gt; &lt;%= activity_form.radio_button :whatdoing, 1 %&gt; &lt;/div&gt; &lt;div class="field"&gt; &lt;%= activity_form.label :beer %&gt; &lt;%= activity_form.text_field :beer %&gt; &lt;/div&gt; &lt;div class="field"&gt; &lt;%= activity_form.label :where %&gt; &lt;%= activity_form.text_field :where %&gt; &lt;/div&gt; &lt;div class="field"&gt; &lt;%= activity_form.label :with %&gt; &lt;%= activity_form.text_field :with %&gt; &lt;/div&gt; &lt;%= activity_form.fields_for :location do |location_fields| %&gt; &lt;div class="field search"&gt; &lt;%= label_tag :search %&gt; &lt;%= text_field_tag :location_search, nil, :size =&gt; 60, :type =&gt; "search" %&gt; &lt;/div&gt; &lt;br /&gt; &lt;div class="field"&gt; &lt;%= location_fields.label :address, "Full Address" %&gt; &lt;%= location_fields.text_field :address, :size =&gt; 60 %&gt; &lt;/div&gt; &lt;div class="field"&gt; &lt;%= location_fields.label :location_name %&gt; &lt;%= location_fields.text_field :location_name, :size =&gt; 18 %&gt; &lt;%= location_fields.label :phone_number %&gt; &lt;%= location_fields.text_field :phone_number, :size =&gt; 18 %&gt; &lt;/div&gt; &lt;div class="field"&gt; &lt;%= location_fields.label :district %&gt; &lt;%= location_fields.text_field :district, :size =&gt; 18 %&gt; &lt;%= location_fields.label :postcode %&gt; &lt;%= location_fields.text_field :postcode, :size =&gt; 6, :type =&gt; 'number' %&gt; &lt;/div&gt; &lt;div class="field"&gt; &lt;%= location_fields.label :city %&gt; &lt;%= location_fields.text_field :city, :size =&gt; 18 %&gt; &lt;%= location_fields.label :country %&gt; &lt;%= location_fields.text_field :country, :size =&gt; 18 %&gt; &lt;/div&gt; &lt;div class="field"&gt; &lt;%= location_fields.label :lat %&gt; &lt;%= location_fields.text_field :lat, :size=&gt; 18 %&gt; &lt;%= location_fields.label :lng %&gt; &lt;%= location_fields.text_field :lng, :size=&gt; 18 %&gt; &lt;/div&gt; &lt;% end %&gt; &lt;%= render :partial =&gt; "googlemap" %&gt; &lt;div class="actions"&gt; &lt;%= activity_form.submit %&gt; &lt;/div&gt; &lt;% end %&gt; </code></pre>
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