Rails 5 nested form won't create child records -


i've been stuck on hours. don't understand how nested forms , using 'accepts_nested_attributes_for' supposed work.

i have 'form_for' new list, , 'fields_for' it's list_items. here fields_for list_items.

fields_for :list_items

https://pastebin.com/nxzwgeyj

now, 'list_item' :through part of list's has_many_through associations user's 'user_items'. nested form supposed submit information 'user_item' needed build 'list_item' belong new list. seems somewhere along way parameters child items not being delivered...

started post "/list" 127.0.0.1 @ 2017-08-17 18:18:04 -0400 processing listscontroller#create html   parameters: {"utf8"=>"✓", "authenticity_token"=>"203d1bpqzzku9j0gyupovqnfbkxmreydlmb4idaradnjvx5fqcydg5due/d2ngwocu6afkc+hwl5qcpfu9glqw==", "list"=>{"name"=>"", "list_items_attributes"=>{"0"=>{"user_item_id"=>"1", "quantity"=>"1"}, "1"=>{"user_item_id"=>"2", "quantity"=>"1"}, "2"=>{"quantity"=>"1"}, "3"=>{"quantity"=>"1"}, "4"=>{"quantity"=>"1"}, "5"=>{"quantity"=>"1"}, "6"=>{"quantity"=>"1"}, "7"=>{"quantity"=>"1"}, "8"=>{"quantity"=>"1"}}}, "commit"=>"submit"}

and instead @list fails save , 2 flash error messages pop up:

["list items list must exist", "list items user item must exist"]

this tells me somehow list_items aren't being build correctly, or fields isn't right...or something. stuck. anyway, here's lists controller:

https://pastebin.com/kdzhq6vb

and list model:

https://pastebin.com/mth8yf2s

and again fields_for :list_items

https://pastebin.com/nxzwgeyj

i hope makes sense. thanks

update

something noticed in parameters being sent form nested params hash appears part array...?

"list_items_attributes"=>{"0"=>{"user_item_id"=>"1", "quantity"=>"1"}, "1"=>{"user_item_id"=>"2", "quantity"=>"1"}

this not reflected in list_params , may issue...still not sure fix though:

def list_params   params.require(:list).permit(:name, list_items_attributes: {:user_item_id, :quantity}) end


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