Rails 4 unpermitted parameters for Postgres type array

Question

I recently performed a migration turning a string column into a Postgres array. The migration was as follows:

  def change
    change_column :projects, :layout_slug, "varchar[] USING (string_to_array(layout_slug, ','))"
  end

Now, I'm running into an issue with Unpermitted parameters: layout_slug. I've tried all of the accepted answers for the other StackOverflow questions and they're still not working for me. Here are all of the variations I've tried so far:

def project_params
    params.require(:project).permit(:image_slug, { layout_slug: [] }, :category, ..., :selection => [:inputs => Project::ALLOWED_INPUTS.keys])
end

def project_params
    params.require(:project).permit(:image_slug, { :layout_slug => [] }, :category, ..., :selection => [:inputs => Project::ALLOWED_INPUTS.keys])
end

I then tried removing the brackets around :layout_slug => [] and I got an error:

SyntaxError (/.../app/controllers/api/v1/projects_controller.rb:62: syntax error, unexpected ',', expecting =>
... :layout_slug => [], :category, :subcategory, :version, :ema...
...                               ^
/.../app/controllers/api/v1/projects_controller.rb:62: syntax error, unexpected ')', expecting keyword_end
/.../app/controllers/api/v1/projects_controller.rb:165: syntax error, unexpected end-of-input, expecting keyword_end):

# THIS ONE THROWS A SYNTAX ERROR
def project_params
    params.require(:project).permit(:image_slug, :layout_slug => [], :category, :subcategory, :version, :email, :zip_code, :selection => [:inputs => Project::ALLOWED_INPUTS.keys])
end

So then I moved layout_slug to the end, and it went back to throwing the Unpermitted parameters: layout_slug error again.

# This throws the same Unpermitted parameters error as before
def project_params
    params.require(:project).permit(:image_slug, ..., :selection => [:inputs => Project::ALLOWED_INPUTS.keys], :layout_slug => [])
end

I've double- and triple-checked the spelling, and I've verified that the front-end is submitting an Array.

What am I missing?? Was there something wrong with my migration? Or is there something blatantly wrong with my permit method?

blelump · Accepted Answer · 2014-10-24 14:11:21Z

2

I've tested your sample code and it seems to be fine:

raw_parameters = { :image_slug => "some_slug", :category => "A", :layout_slug => ["a", "b"] }
parameters = ActionController::Parameters.new(raw_parameters)
parameters.permit(:image_slug, :category, :layout_slug => []) 
# {"image_slug"=>"some_slug", "category"=>"A", "layout_slug"=>["a", "b"]}

Check your params :layout_slug format, perhaps that's the case

answered Oct 24, 2014 at 14:11

blelump

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