phoenix framework - How to implement to_query(data) in Elixir Struct -

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i attempting update existing records in database using repo.update:

  def subscribe_email(conn, %{"email-address"=>email_address, "shop"=>shop})     current_record = repo.all(%oauth.emailaddress{email_address: email_address, active: false, shop: shop, verified: :true})     current_record = ecto.changeset.change(current_record, active: :true)     case repo.update current_record       {:ok, struct} -> io.puts "updated correctly."       {:error, changeset} -> io.puts "did not update"     end   end

i have model %oauth.emailaddress:

defmodule oauth.emailaddress   use ecto.model    schema "email_address"     field :email_address, :string     field :active, :boolean     field :shop, :string     field :verified, :boolean     timestamps   end end

when hit subscribe_email(), exception raised:

** (protocol.undefinederror) protocol ecto.queryable not implemented   %oauth.emailaddress

i know need implement to_query() ecto.queryable. however, not know how this. not familiar protocols in elixir, although have read official documentation, have not used protocols. please explain how implement to_query() struct.

that error bit misleading. repo.all doesn't accept struct fields filled in that. you're looking this:

current_record =   from(oauth.emailaddress)   |> where(email_address: email_address, active: false, shop: shop, verified: :true)   |> repo.all

also, since you're passing result ecto.changeset.change, want 1 record, not list of records:

current_record =   from(oauth.emailaddress)   |> where(email_address: email_address, active: false, shop: shop, verified: :true)   |> repo.one

note fail if there's more 1 matching record query.


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