hello i am having issues with loading nested associations im sure its been answered befor sorry for repeating if so i looked and could find nothing calendar events have jobs which have associated start and end locations
when i inspect like in the example i get nil association not loaded, am i not loading these associations correctly?
defmodule Site.CalendarEvent do
use Site.Web, :model
schema "calendar_event" do
field :title, :string
field :allDay, :string
field :start, :string
field :end, :string
field :url, :string
field :className, :string
field :editable, :string
field :startEditable, :string
field :durationEditable, :string
field :resourceEditable, :string
field :rendering, :string
field :overlap, :string
field :uuid, :string
field :constraint, :string
field :source, :string
field :color, :string
field :backgroundColor, :string
field :borderColor, :string
field :textColor, :string
field :date, Calecto.DateTime
field :datetime, Calecto.DateTime
field :posted_on, Calecto.DateTime
timestamps()
belongs_to :user, Site.User
belongs_to :job, Site.Job
end
@doc """
Builds a changeset based on the `struct` and `params`.
"""
def changeset(struct, params \\ %{}) do
struct
|> cast(params, [:start, :uuid, :user_id, :title, :job_id])
end
end
defmodule Site.Location do
use Site.Web, :model
schema "locations" do
field :address, :string
field :city, :string
field :state, :string
field :zip, :string
field :customer_id, :integer
field :apt, :string
belongs_to :job, Site.Job
timestamps()
end
@doc """
Builds a changeset based on the `struct` and `params`.
"""
def changeset(struct, params \\ %{}) do
struct
|> cast(params, [ :address, :city, :state, :zip, :customer_id, :job_id, :apt ])
|> validate_required([ :address, :city, :state, :zip])
|> foreign_key_constraint(:customer)
end
end
defmodule Site.Job do
use Site.Web, :model
schema "jobs" do
field :type, :string
field :status, :string
field :uuid, :string
field :amount, Money.Ecto.Type
timestamps()
has_one :calendar_events, Site.CalendarEvent
has_one :lead, Site.Lead
belongs_to :start_location, Site.Location
belongs_to :end_location, Site.Location
belongs_to :customer, Site.Customer
belongs_to :user, Site.User
has_many :events, Site.JobEvents
has_many :locations, Site.Location
end
@doc """
Builds a changeset based on the `struct` and `params`.
"""
def changeset(struct, params \\ %{}) do
struct
|> cast(params, [:total_distance, :move_weight, :type, :amount, :customer_id, :status, :user_id, :uuid, :start_location_id, :end_location_id])
|> validate_required([:total_distance, :move_weight, :type, :amount, :customer_id])
end
def updatechangeset(struct, params \\ %{}) do
struct
|> cast(params, [:uuid, :user_id, :status])
end
def locationschangeset(struct, params \\ %{}) do
IO.inspect(params, label: "params")
struct
|> put_assoc(:start_location, params["start_location"])
|> put_assoc(:end_location, params["end_location"])
end
end
in the controller i have a function that i post to
def calendar(conn, params) do
import Ecto.Query, only: [from: 2]
user_id = conn.assigns.current_user.id
jobs = Site.Repo.all from e in CalendarEvent,
where: e.user_id == ^user_id,
preload: [job: :start_location, job: :end_location]
render(conn, "booked.json", events: jobs )
end
and in the view i serialize the json in the view as followes
def render("booked.json", %{events: events} ) do
events = case events do
nil -> []
_-> Enum.map(events, &events_json/1)
end
end
def events_json(event) do
job = event.job
IO.inspect(job, label: "event")
lead = job.lead
start_location = job.start_location
end_location = job.end_location
start_string = start_location.address <> " " <> start_location.city <> ", " <> start_location.state <> " " <> start_location.zip
end_string = end_location.address <> " " <> end_location.city <> ", " <> end_location.state <> " " <> end_location.zip
miles = to_string (ParseTransform.to_miles(job.total_distance))
title = "title"
%{
title: title,
description: title,
start: event.start,
end: event.end,
url: event.url ,
from: start_string,
to: end_string,
className: event.className ,
editable: event.editable ,
startEditable: event.startEditable ,
durationEditable: event.durationEditable ,
resourceEditable: event.resourceEditable ,
rendering: event.rendering ,
overlap: event.overlap ,
constraint: event.constraint ,
source: event.source ,
color: event.color ,
backgroundColor: event.backgroundColor,
borderColor: event.borderColor,
textColor: event.textColor ,
date: event.date ,
datetime: event.datetime,
posted_on: event.posted_on
}
end
