Twfo326

Twfo326

Postgrex Error 42P01 relation "characters" does not exist

I’m running into this error

** (Postgrex.Error) ERROR 42P01 (undefined_table) relation "characters" does not exist 

when I try to insert a character into the DB.

Steps taken:

Creating a movie:

alias Friends.{Movie, Character, Repo}

movie = %Movie{title: "Ready Player One", tagline: "Something about video games"}

Inserting the movie:
movie = Repo.insert!(movie)

Creating a character

character = Ecto.build_assoc(movie, :characters, %{name: "Wade Watts"})

Inserting a character

Repo.insert!(character)

18:03:52.358 [debug] QUERY ERROR db=0.0ms queue=5.5ms idle=1209.5ms
INSERT INTO "characters" ("movie_id","name") VALUES ($1,$2) RETURNING "id" [1, "Bruce"]
** (Postgrex.Error) ERROR 42P01 (undefined_table) relation "characters" does not exist

    query: INSERT INTO "characters" ("movie_id","name") VALUES ($1,$2) RETURNING "id"
    (ecto_sql 3.7.2) lib/ecto/adapters/sql.ex:760: Ecto.Adapters.SQL.raise_sql_call_error/1
    (ecto 3.7.2) lib/ecto/repo/schema.ex:744: Ecto.Repo.Schema.apply/4
    (ecto 3.7.2) lib/ecto/repo/schema.ex:367: anonymous fn/15 in Ecto.Repo.Schema.do_insert/4
    (ecto 3.7.2) lib/ecto/repo/schema.ex:269: Ecto.Repo.Schema.insert!/4

Output from:
mix do ecto.drop, ecto.create, ecto.migrate

The database for Friends.Repo has been dropped
The database for Friends.Repo has been created

17:59:56.273 [info]  == Running 20220316202504 Friends.Repo.Migrations.CreatePeople.change/0 forward

17:59:56.278 [info]  create table people

17:59:56.297 [info]  == Migrated 20220316202504 in 0.0s

17:59:56.342 [info]  == Running 20220316223207 Friends.Repo.Migrations.CreateMovies.change/0 forward

17:59:56.342 [info]  create table movies

17:59:56.356 [info]  == Migrated 20220316223207 in 0.0s

17:59:56.364 [info]  == Running 20220316224808 Friends.Repo.Migrations.CreateCharacters.change/0 forward

17:59:56.364 [info]  create table charaters

17:59:56.372 [info]  == Migrated 20220316224808 in 0.0s

17:59:56.380 [info]  == Running 20220317003543 Friends.Repo.Migrations.CreateDistributors.change/0 forward

17:59:56.380 [info]  create table distributors

17:59:56.388 [info]  create index distributors_movie_id_index

17:59:56.394 [info]  == Migrated 20220317003543 in 0.0s

17:59:56.402 [info]  == Running 20220318020506 Friends.Repo.Migrations.CreateActors.change/0 forward

17:59:56.402 [info]  create table actors

17:59:56.414 [info]  == Migrated 20220318020506 in 0.0s

17:59:56.421 [info]  == Running 20220318020901 Friends.Repo.Migrations.CreateMoviesActors.change/0 forward

17:59:56.421 [info]  create table movies_actors

17:59:56.429 [info]  create index movies_actors_movie_id_actor_id_index

17:59:56.435 [info]  == Migrated 20220318020901 in 0.0s

movie schema:

defmodule Friends.Movie do
  use Ecto.Schema

  schema "movies" do
    field(:title, :string)
    field(:tagline, :string)
    has_many(:characters, Friends.Character)
    has_one(:distributor, Friends.Distributor)
    many_to_many(:actors, Friends.Actor, join_through: "movies_actors")
  end
end

character schema`

defmodule Friends.Character do
  use Ecto.Schema

  schema "characters" do
    field(:name, :string)
    belongs_to(:movie, Friends.Movie)
  end
end

*The project is from the Ecto Elixir School tutorial
https://elixirschool.com/en/lessons/ecto/associations

Marked As Solved

benwilson512

benwilson512

Author of Craft GraphQL APIs in Elixir with Absinthe

It looks like you have a typo here. This says “charaters” but should be “characters”.

In the future, you can also psql your_database_here and then type \l to have it list the tables that exist, which can help make it easier to see typos like this.

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