amirOrbe
Hi
,
I am trying to save data from an appointment form in which there is a many-to-many relationship (one appointment can have many services and one service can have many appointments), in the appointment form I can select several services and I want to store the services selected in the database with the many-to-many relationship.
Here is my schema of the appointments:
defmodule MedussaStudio.Appointments.Appointment do
alias MedussaStudio.AppointmentsServices.AppointmentService
alias MedussaStudio.Accounts
use Ecto.Schema
import Ecto.Changeset
schema "appointments" do
field :date, :date
field :start_time, :time
field :end_time, :time
belongs_to :user, Accounts.User
many_to_many :appointment_services, MedussaStudio.Services.Service,
join_through: AppointmentService,
on_replace: :delete
timestamps(type: :utc_datetime)
end
@doc false
def changeset(appointment, attrs) do
appointment
|> cast(attrs, [:date, :start_time, :end_time, :user_id])
|> validate_required([:date, :start_time, :end_time])
end
end
Here is my schema of the services:
defmodule MedussaStudio.Services.Service do
alias MedussaStudio.AppointmentsServices.AppointmentService
use Ecto.Schema
import Ecto.Changeset
schema "services" do
field :name, :string
field :price, :decimal
many_to_many :appointment_services, MedussaStudio.Appointments.Appointment,
join_through: AppointmentService,
on_replace: :delete
timestamps(type: :utc_datetime)
end
@doc false
def changeset(service, attrs) do
service
|> cast(attrs, [:name, :price])
|> validate_required([:name, :price])
end
end
And here is the function of my live view that saves the appointments:
defp save_appointment(socket, :new, appointment_params) do
case Appointments.create_appointment(add_user_id_to_appointment(socket, appointment_params)) do
{:ok, appointment} ->
%{"services" => services} = appointment_params
id_services =
Enum.map(services, fn service ->
service |> String.to_integer() |> Services.get_service!()
end)
updated_appointment =
appointment
|> Repo.preload(:appointment_services)
|> Ecto.Changeset.change()
|> Ecto.Changeset.put_assoc(
:appointment_services,
id_services
)
|> Repo.update()
case updated_appointment do
{:ok, appointment} ->
notify_parent({:saved, appointment})
{:noreply,
socket
|> put_flash(:info, "Cita creada exitosamente")
|> push_patch(to: socket.assigns.patch)}
{:error, %Ecto.Changeset{} = changeset} ->
{:noreply, assign_form(socket, changeset)}
end
{:error, %Ecto.Changeset{} = changeset} ->
{:noreply, assign_form(socket, changeset)}
end
end
This is my schema of appointment services that saves the association:
defmodule MedussaStudio.AppointmentsServices.AppointmentService do
use Ecto.Schema
schema "appointments_services" do
belongs_to :service, MedussaStudio.Services.Service
belongs_to :appointment, MedussaStudio.Appointments.Appointment
timestamps()
end
end
And this is my error when i try to save the appointment with the appointment form data
[error] GenServer #PID<0.6405.0> terminating
** (Postgrex.Error) ERROR 42703 (undefined_column) column "id" does not exist
query: INSERT INTO "appointments_services" ("appointment_id","service_id","inserted_at","updated_at") VALUES ($1,$2,$3,$4) RETURNING "id"
(ecto_sql 3.11.1) lib/ecto/adapters/sql.ex:1054: Ecto.Adapters.SQL.raise_sql_call_error/1
(ecto 3.11.1) lib/ecto/repo/schema.ex:775: Ecto.Repo.Schema.apply/4
(ecto 3.11.1) lib/ecto/repo/schema.ex:377: anonymous fn/15 in Ecto.Repo.Schema.do_insert/4
(ecto 3.11.1) lib/ecto/association.ex:1584: Ecto.Association.ManyToMany.on_repo_change/5
(ecto 3.11.1) lib/ecto/association.ex:648: anonymous fn/8 in Ecto.Association.on_repo_change/7
(elixir 1.15.4) lib/enum.ex:2510: Enum."-reduce/3-lists^foldl/2-0-"/3
(ecto 3.11.1) lib/ecto/association.ex:644: Ecto.Association.on_repo_change/7
(elixir 1.15.4) lib/enum.ex:2510: Enum."-reduce/3-lists^foldl/2-0-"/3
(ecto 3.11.1) lib/ecto/association.ex:589: Ecto.Association.on_repo_change/4
(ecto 3.11.1) lib/ecto/repo/schema.ex:955: Ecto.Repo.Schema.process_children/5
(ecto 3.11.1) lib/ecto/repo/schema.ex:1033: anonymous fn/3 in Ecto.Repo.Schema.wrap_in_transaction/6
(ecto_sql 3.11.1) lib/ecto/adapters/sql.ex:1358: anonymous fn/3 in Ecto.Adapters.SQL.checkout_or_transaction/4
(db_connection 2.6.0) lib/db_connection.ex:1710: DBConnection.run_transaction/4
(medussa_studio 0.1.0) lib/medussa_studio_web/live/appointment_live/form_component.ex:117: MedussaStudioWeb.AppointmentLive.FormComponent.save_appointment/3
(phoenix_live_view 0.20.7) lib/phoenix_live_view/channel.ex:729: anonymous fn/4 in Phoenix.LiveView.Channel.inner_component_handle_event/4
(telemetry 1.2.1) /Users/amir/Desktop/medussa_studio/deps/telemetry/src/telemetry.erl:321: :telemetry.span/3
(phoenix_live_view 0.20.7) lib/phoenix_live_view/diff.ex:209: Phoenix.LiveView.Diff.write_component/4
(phoenix_live_view 0.20.7) lib/phoenix_live_view/channel.ex:661: Phoenix.LiveView.Channel.component_handle/4
(stdlib 5.0.2) gen_server.erl:1077: :gen_server.try_handle_info/3
(stdlib 5.0.2) gen_server.erl:1165: :gen_server.handle_msg/6
Any help appreciated.
Thanks!
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JohnnyCurran
Hi
What does the migration look like to create the table?
If you do not have a regular primary key on the join table, put an @primary_key false on top of the schema definition. This will tell Ecto not to assume there’s an id column on the table. Should fix the issue
amirOrbe
Thank you
that works