Fix queries for Ecto 3

Author: leonid-shevtsov

lib/ex_queb.ex

@@ -79,19 +79,20 @@ defmodule ExQueb do
   end
 
   defp _build_date_filter(query, fld, value, :gte) do
-    where(query, [q], fragment("? >= ?", field(q, ^fld), type(^value, Ecto.DateTime)))
+    where(query, [q], fragment("? >= ?", field(q, ^fld), type(^value, DateTime)))
   end
 
   defp _build_date_filter(query, fld, value, :lte) do
-    where(query, [q], fragment("? <= ?", field(q, ^fld), type(^value, Ecto.DateTime)))
+    where(query, [q], fragment("? <= ?", field(q, ^fld), type(^value, DateTime)))
   end
 
   defp cast_date_time(value) do
-    {:ok, date} = Ecto.Date.cast(value)
+    value
+    # {:ok, date} = Ecto.Date.cast(value)
 
-    date
-    |> Ecto.DateTime.from_date()
-    |> Ecto.DateTime.to_string()
+    # date
+    # |> Ecto.DateTime.from_date()
+    # |> Ecto.DateTime.to_string()
   end
 
   @doc """
@@ -165,7 +166,7 @@ defmodule ExQueb do
 
   defp get_default_order_by_field(query) do
     case query do
-      %{from: {_, mod}} ->
+      %Ecto.Query{from: %Ecto.Query.FromExpr{source: {_, mod}}} ->
         case mod.__schema__(:primary_key) do
           [name | _] -> name
           _ -> mod.__schema__(:fields) |> List.first()