Models for upload and post; generated liveview controller for posts

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diff --git a/lib/aggiedit/uploads.ex b/lib/aggiedit/uploads.ex
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+defmodule Aggiedit.Uploads do
+  @moduledoc """
+  The Uploads context.
+  """
+
+  import Ecto.Query, warn: false
+  alias Aggiedit.Repo
+
+  alias Aggiedit.Uploads.Upload
+
+  @doc """
+  Returns the list of uploads.
+
+  ## Examples
+
+      iex> list_uploads()
+      [%Upload{}, ...]
+
+  """
+  def list_uploads do
+    Repo.all(Upload)
+  end
+
+  @doc """
+  Gets a single upload.
+
+  Raises `Ecto.NoResultsError` if the Upload does not exist.
+
+  ## Examples
+
+      iex> get_upload!(123)
+      %Upload{}
+
+      iex> get_upload!(456)
+      ** (Ecto.NoResultsError)
+
+  """
+  def get_upload!(id), do: Repo.get!(Upload, id)
+
+  @doc """
+  Creates a upload.
+
+  ## Examples
+
+      iex> create_upload(%{field: value})
+      {:ok, %Upload{}}
+
+      iex> create_upload(%{field: bad_value})
+      {:error, %Ecto.Changeset{}}
+
+  """
+  def create_upload(attrs \\ %{}) do
+    %Upload{}
+    |> Upload.changeset(attrs)
+    |> Repo.insert()
+  end
+
+  @doc """
+  Updates a upload.
+
+  ## Examples
+
+      iex> update_upload(upload, %{field: new_value})
+      {:ok, %Upload{}}
+
+      iex> update_upload(upload, %{field: bad_value})
+      {:error, %Ecto.Changeset{}}
+
+  """
+  def update_upload(%Upload{} = upload, attrs) do
+    upload
+    |> Upload.changeset(attrs)
+    |> Repo.update()
+  end
+
+  @doc """
+  Deletes a upload.
+
+  ## Examples
+
+      iex> delete_upload(upload)
+      {:ok, %Upload{}}
+
+      iex> delete_upload(upload)
+      {:error, %Ecto.Changeset{}}
+
+  """
+  def delete_upload(%Upload{} = upload) do
+    Repo.delete(upload)
+  end
+
+  @doc """
+  Returns an `%Ecto.Changeset{}` for tracking upload changes.
+
+  ## Examples
+
+      iex> change_upload(upload)
+      %Ecto.Changeset{data: %Upload{}}
+
+  """
+  def change_upload(%Upload{} = upload, attrs \\ %{}) do
+    Upload.changeset(upload, attrs)
+  end
+end