Column not found when seeding database with structs with has_many relationship

I first tried seeding my database with a simple one level deep structs and it works great. However, when I add in a Path mapping to match my top level structs paths field then I get the error.

 ** (Postgrex.Error) ERROR 42703 (undefined_column): column "apis_id" of relation "paths" does not exist

I've tried removing the apis_id but I believe I need that field to preload the Path struct in my ApiController. Perhaps the problem lies in my has_many/belongs_to syntax although I believe I have it correct and I've tried swamping out other foreign_keys and references with no luck.

I could also be just missing something really stupid and need some fresh eyes, but I'm hoping my understanding of this relationship is possibly messed up.

Here are my migrations:

_create_api.exs

defmodule App.Repo.Migrations.CreateApi do
  use Ecto.Migration

  def change do
    create table(:apis) do
      add :basePath, :string
      add :definitions, :string
      add :paths, references(:paths)

      timestamps()
    end
  end
end

_create_paths.exs

defmodule App.Repo.Migrations.CreatePath do
  use Ecto.Migration

  def change do
    create table(:paths) do
      add :apis_id, :string
      add :route, :string

      timestamps()
    end
  end
end

My models: api.ex

defmodule App.Api do
  use App.Web, :model

  schema "apis" do
    field :basePath, :string
    field :definitions, :string
    has_many :paths, App.Path, foreign_key: :apis_id

    timestamps()
  end
end

path.ex

defmodule App.Path do
  use App.Web, :model

  schema "paths" do
    belongs_to :apis, App.Api, references: :apis_id
    field :route, :string

    timestamps()
  end
end

Also here is my ApiController api_controller.ex

defmodule App.ApiController do
  use App.Web, :controller

  alias App.Api

  def index(conn, _params) do
    apis = Repo.all(Api) |> Repo.preload([:paths])
    render conn, "index.json", apis: apis
  end
end

And finally my seeds.ex

alias App.Repo
alias App.Path
alias App.Api

api = %Api{
  basePath: "v1",
  definitions: "none",
  paths: [
    %Path{
      apis_id: 1,
      route: "/account"
    }
  ]
}

Repo.insert! api

This works if I rip out the %Path mapping and make it an empty string.

Any help of steering in the correct direction would be greatly appreciated!

Thank you in advance.