Hi guys I’m having troubles with one preload.

I’m creating one property and I’m adding preloads, but when not have any register for has_one association is returning nil and through this error

     ** (RuntimeError) cannot encode association :address from MyApp.Model.Property to JSON because the association was not loaded.
     
     You can either preload the association:
     
         Repo.preload(MyApp.Model.Property, :address)
     
     Or choose to not encode the association when converting the struct to JSON by explicitly listing the JSON fields in your schema:
     
         defmodule MyApp.Model.Property do
           # ...
     
           @derive {Jason.Encoder, only: [:name, :title, ...]}
           schema ... do

I’ve print the Property created and looks like this

%MyApp.Model.Property{
  __meta__: #Ecto.Schema.Metadata<:loaded, "properties">,
  address: nil,
  currency: "USD",
  description: "Depto 2 ambientes",
  id: 908,
  inserted_at: ~N[2021-05-14 15:29:52],
  price: 260000,
  property_features: nil,
  property_images: [],
  property_type: "department",
  spaces: 2,
  status: true,
  subscriptions: [],
  updated_at: ~N[2021-05-14 15:29:52],
  user: #Ecto.Association.NotLoaded<association :user is not loaded>,
  user_id: 3093
}

I think that this could be for the nil returned in the property?

This is my function to create the property.

  def create_property(user) do
    Repo.insert!(%Property{
      description: "Depto 2 ambientes",
      price: 260_000,
      currency: "USD",
      spaces: 2,
      status: true,
      property_type: "department",
      user_id: user.id
    }) |> Repo.preload([:address, :subscriptions, :property_features, :property_images]) |> IO.inspect
  end

and this is the schema in property.ex

  @derive {Jason.Encoder, except: [:__meta__, :inserted_at, :updated_at, :user]}

  schema "properties" do
    field :spaces, :integer
    field :currency, :string
    field :description, :string
    field :price, :integer
    field :property_type, :string
    field :status, :boolean, default: false
    belongs_to :user, User
    has_one :address, Address
    has_one :property_features, PropertyFeatures
    has_many :subscriptions, Subscription
    has_many :property_images, PropertyImages

    timestamps()
  end

Any have idea where is the problem?