All seems correct. I checked migration credential too, but same error.
What @chrismccord wanted to know is, if you have a line like this in your module:
alias FooBar.Credentials
If it is there, please show more of your code.
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As @chrismccord and @NobbZ wrote, there is no such module as Credentials in your code, so you have to use alias for proper module, namely Ins.Accounts.Credentials as we can see in the screenshot.
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here are my files:
Credential.ex
defmodule Ins.Accounts.Credential do
use Ecto.Schema
import Ecto.Changeset
alias Ins.Accounts.{Credential, User}
schema "credentials" do
field :email, :string
belongs_to :user, User
timestamps()
end
@doc false
def changeset(%Credential{} = credential, attrs) do
credential
|> cast(attrs, [:email])
|> validate_required([:email])
|> unique_constraint(:email)
end
end
User.ex
defmodule Ins.Accounts.User do
use Ecto.Schema
import Ecto.Changeset
alias Ins.Accounts.{User, Credential}
schema "users" do
field :name, :string
field :username, :string
has_one :credential, Credential
timestamps()
end
@doc false
def changeset(%User{} = user, attrs) do
user
|> cast(attrs, [:name, :username])
|> validate_required([:name, :username])
|> unique_constraint(:username)
end
end
Account.ex
defmodule Ins.Accounts do
@moduledoc """
The Accounts context.
"""
import Ecto.Query, warn: false
alias Ins.Repo
alias Ins.Accounts.User
@doc """
Returns the list of users.
## Examples
iex> list_users()
[%User{}, ...]
"""
def list_users do
User
|> Repo.all()
|> Repo.preload(:credential)
end
...
endSo in your InsWeb.Controllers.UserController (Iām guessing it is) at the top of your module definition you need to add something like alias Ins.Accounts.Credentials to bring Credentials into active scope. 
I tried it ā¦before I posted this troubleshootā¦I doesnāt work.
We still have not seen your InsWeb.Controllers.UserController code, because it absolutely should work. ^.^
my generated user_controller.ex looks like that:
defmodule InsWeb.UserController do
use InsWeb, :controller
alias Ins.Accounts
alias Ins.Accounts.User
## alias Ins.Accounts.Credential
def index(conn, _params) do
users = Accounts.list_users()
render(conn, "index.html", users: users)
end
def new(conn, _params) do
changeset = Accounts.change_user(%User{})
render(conn, "new.html", changeset: changeset)
end
def create(conn, %{"user" => user_params}) do
case Accounts.create_user(user_params) do
{:ok, user} ->
conn
|> put_flash(:info, "User created successfully.")
|> redirect(to: user_path(conn, :show, user))
{:error, %Ecto.Changeset{} = changeset} ->
render(conn, "new.html", changeset: changeset)
end
end
def show(conn, %{"id" => id}) do
user = Accounts.get_user!(id)
render(conn, "show.html", user: user)
end
def edit(conn, %{"id" => id}) do
user = Accounts.get_user!(id)
changeset = Accounts.change_user(user)
render(conn, "edit.html", user: user, changeset: changeset)
end
def update(conn, %{"id" => id, "user" => user_params}) do
user = Accounts.get_user!(id)
case Accounts.update_user(user, user_params) do
{:ok, user} ->
conn
|> put_flash(:info, "User updated successfully.")
|> redirect(to: user_path(conn, :show, user))
{:error, %Ecto.Changeset{} = changeset} ->
render(conn, "edit.html", user: user, changeset: changeset)
end
end
def delete(conn, %{"id" => id}) do
user = Accounts.get_user!(id)
{:ok, _user} = Accounts.delete_user(user)
conn
|> put_flash(:info, "User deleted successfully.")
|> redirect(to: user_path(conn, :index))
end
endYou have commented the alias line. Remove the # in front of it.
That actually will not work in this case.
Seeing this file is definitely what I needed. Iām guessing, based on counting, that this line is line 45:
case Accounts.update_user(user, user_params) do
And if so it is failing inside that, so next we need to see your INS.Account module, I bet it is that module that needs the alias (wherever the Credentials.changeset call actually exists is the same module where the alias needs to exist).
@OvermindDL1 my account module is up. I thought also that Iād add this alias in my Account module but it shown the same result.
Here is the whole content:
defmodule Ins.Accounts do
@moduledoc """
The Accounts context.
"""
import Ecto.Query, warn: false
alias Ins.Repo
alias Ins.Accounts.User
# alias Ins.Accounts.Credential
@doc """
Returns the list of users.
## Examples
iex> list_users()
[%User{}, ...]
"""
def list_users do
User
|> Repo.all()
|> Repo.preload(:credential)
end
@doc """
Gets a single user.
Raises `Ecto.NoResultsError` if the User does not exist.
## Examples
iex> get_user!(123)
%User{}
iex> get_user!(456)
** (Ecto.NoResultsError)
"""
# def get_user!(id), do: Repo.get!(User, id)
def get_user!(id) do
User
|> Repo.get!(id)
|> Repo.preload(:credential)
end
@doc """
Creates a user.
## Examples
iex> create_user(%{field: value})
{:ok, %User{}}
iex> create_user(%{field: bad_value})
{:error, %Ecto.Changeset{}}
"""
def create_user(attrs \\ %{}) do
%User{}
|> User.changeset(attrs)
|> Ecto.Changeset.cast_assoc(:credential, with: &Credential.changeset/2)
|> Repo.insert()
end
@doc """
Updates a user.
## Examples
iex> update_user(user, %{field: new_value})
{:ok, %User{}}
iex> update_user(user, %{field: bad_value})
{:error, %Ecto.Changeset{}}
"""
def update_user(%User{} = user, attrs) do
user
|> User.changeset(attrs)
|> Ecto.Changeset.cast_assoc(:credential, with: &Credential.changeset/2)
|> Repo.update()
end
@doc """
Deletes a User.
## Examples
iex> delete_user(user)
{:ok, %User{}}
iex> delete_user(user)
{:error, %Ecto.Changeset{}}
"""
def delete_user(%User{} = user) do
Repo.delete(user)
end
@doc """
Returns an `%Ecto.Changeset{}` for tracking user changes.
## Examples
iex> change_user(user)
%Ecto.Changeset{source: %User{}}
"""
def change_user(%User{} = user) do
User.changeset(user, %{})
end
alias Ins.Accounts.Credential
@doc """
Returns the list of credentials.
## Examples
iex> list_credentials()
[%Credential{}, ...]
"""
def list_credentials do
Repo.all(Credential)
end
@doc """
Gets a single credential.
Raises `Ecto.NoResultsError` if the Credential does not exist.
## Examples
iex> get_credential!(123)
%Credential{}
iex> get_credential!(456)
** (Ecto.NoResultsError)
"""
def get_credential!(id), do: Repo.get!(Credential, id)
@doc """
Creates a credential.
## Examples
iex> create_credential(%{field: value})
{:ok, %Credential{}}
iex> create_credential(%{field: bad_value})
{:error, %Ecto.Changeset{}}
"""
def create_credential(attrs \\ %{}) do
%Credential{}
|> Credential.changeset(attrs)
|> Repo.insert()
end
@doc """
Updates a credential.
## Examples
iex> update_credential(credential, %{field: new_value})
{:ok, %Credential{}}
iex> update_credential(credential, %{field: bad_value})
{:error, %Ecto.Changeset{}}
"""
def update_credential(%Credential{} = credential, attrs) do
credential
|> Credential.changeset(attrs)
|> Repo.update()
end
@doc """
Deletes a Credential.
## Examples
iex> delete_credential(credential)
{:ok, %Credential{}}
iex> delete_credential(credential)
{:error, %Ecto.Changeset{}}
"""
def delete_credential(%Credential{} = credential) do
Repo.delete(credential)
end
@doc """
Returns an `%Ecto.Changeset{}` for tracking credential changes.
## Examples
iex> change_credential(credential)
%Ecto.Changeset{source: %Credential{}}
"""
def change_credential(%Credential{} = credential) do
Credential.changeset(credential, %{})
end
endAwesome, that is what I needed, your earlier post cut it off before it showed the error line. ^.^;
So the error line is:
|> Ecto.Changeset.cast_assoc(:credential, with: &Credential.changeset/2)
So yeah, the alias line you have commented out really should be all that is required. Actually Iām not sure how that module is even compiling without it since you struct-create the Credential in that file too. o.O?
Noā¦I commented it because in my own opinion i thought I had to put it at the top level (with no success it showed the same error) otherwise the alias Ins.Accounts.Credential was already insertedā¦with the generatorā¦! line 114
Yeah the generator only puts it at the top of the area where the generator generates code that uses it. If you adjust code āhigherā than the alias to use the code then the alias needs to be moved up too.
2 Likes
@chrismccord @OvermindDL1 @all ā¦
My bad, when I added this alias Ins.Accounts.Credential at the top level after alias Ins.Accounts.User I forgot to delete the one I left at line 114 so the code was corrupted. Now it works.
Thank you!!!
2 Likes
Is there a newer version or is the the final one?
Thank you!
Does it contain an installation guide too?
