Rails 5 - Manually add attribute to parameters in controller when updating -


i trying manually add additional attribute parameters in controller after completing form. params seem wrapped in , seems preventing me changing params.

controller:

class actualscontroller < signedincontroller ...  def update    respond_to |format|    facesheet = actual_params[:facesheet]     #trying manually add attribute    actual_params.merge(:file_name => 'ted.png')    new_params = actual_params.except(:facesheet)        if @actual.update(new_params)         format.html { redirect_to action: 'show', id:@actual.id, notice: 'actual updated.' }         format.json { render :show, status: :ok, location: @actual }       else         format.html { render :edit }         format.json { render json: @actual.errors, status: :unprocessable_entity }       end     end  end ... end

"new_params" console

<actioncontroller::parameters {"encounter_type_id"=>"1", "physician_id"=>"669", "insurance_id"=>"1182", "time_start"=>"05:00", "time_end"=>"07:00", "date_start"=>"2017-08-02", "date_end"=>"2017-08-02", "facility_id"=>"1", "med_rec_num"=>"1244", "patient_name_first"=>"bob", "patient_name_last"=>"smith", "patient_name_middle_initial"=>"h", "patient_dob"=>"2000-02-05", "note"=>"", "is_complete"=>"0", "procedure_ids"=>["", "300"]} permitted: true>  -thanks on this.

"@actual" console

#<actual id: 18, encounter_id: 4, provider_id: 7, encounter_type_id: 1, physician_id: 669, facility_id: 1, insurance_id: 1182, group_id: nil, datetime_start_utc: "2017-08-02 10:00:00", datetime_end_utc: "2017-08-02 12:00:00", payer: nil, med_rec_num: "1244", patient_name_first: "bob", patient_name_last: "smith", patient_name_middle_initial: "h", patient_dob: "2000-02-05", finclass: nil, is_valid: nil, is_complete: false, image_location: nil, note: "", created_at: "2017-08-18 13:30:58", updated_at: "2017-08-18 16:01:28">

in general practice view incoming parameters unmutable. makes debugging , reasoning controller code simpler.

there few tricks can avoid monkeying params.

use block:

# works .new , .create updated = @actual.update(actual_params) |a|   a.foo = current_user.foo   a.b = params.fetch(:foo, "some default") end

use composition create safe parameters methods.

def common_params    [:name, :title] end  def create_params   params.require(:model_name)         .permit(*common_params, :foo) end  def update_params   params.require(:model_name)         .permit(*common_params, :bar) end

using .except can risky since better whitelist blacklist may forget add future attributes blacklist.


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