Se crea el parser para customfilter. Agregamos variables de entorno para manejar url de adjuntos con o sin clave de encriptacion.

lib/api/parser/expression_to_ecto.ex

@@ -0,0 +1,59 @@
+defmodule ExpressionToEcto do
+  import Ecto.Query
+
+  def to_dynamic([]), do: true
+
+  def to_dynamic([single]), do: build_dynamic(single)
+
+  def to_dynamic(ast), do: build_dynamic(ast)
+
+  # Operadores lógicos
+  defp build_dynamic({:or, left, right}) do
+    dynamic([q], ^build_dynamic(left) or ^build_dynamic(right))
+  end
+
+  defp build_dynamic({:and, left, right}) do
+    dynamic([q], ^build_dynamic(left) and ^build_dynamic(right))
+  end
+
+  # Comparaciones con número
+  defp build_dynamic({:comparison, [{:field, field}, op, {:number, val}]}) do
+    field_atom = String.to_atom(field)
+
+    case op do
+      :== -> dynamic([q], field(q, ^field_atom) == ^val)
+      :!= -> dynamic([q], field(q, ^field_atom) != ^val)
+      :>  -> dynamic([q], field(q, ^field_atom) > ^val)
+      :<  -> dynamic([q], field(q, ^field_atom) < ^val)
+      :>= -> dynamic([q], field(q, ^field_atom) >= ^val)
+      :<= -> dynamic([q], field(q, ^field_atom) <= ^val)
+      other -> raise "Operador no soportado: #{inspect(other)}"
+    end
+  end
+
+  # Comparaciones con string
+  defp build_dynamic({:comparison, [{:field, field}, op, {:string, val}]}) when op in [:==, :!=] do
+    field_atom = String.to_atom(field)
+      case op do
+        :== -> dynamic([q], field(q, ^field_atom) == ^val)
+        :!= -> dynamic([q], field(q, ^field_atom) != ^val)
+      end
+  end
+
+  #  ILIKE
+  defp build_dynamic({:comparison, [{:field, field}, :ilike, {:string, val}]}) do
+    field_atom = String.to_atom(field)
+    pattern = "#{val}"
+    dynamic([q], ilike(field(q, ^field_atom), ^pattern))
+  end
+
+  # IN
+  defp build_dynamic({:comparison, [{:field, field}, :in, {:list, vals}]}) do
+    field_atom = String.to_atom(field)
+    dynamic([q], field(q, ^field_atom) in ^vals)
+  end
+
+  defp build_dynamic(other) do
+    raise "AST no soportado o mal formado: #{inspect(other)}"
+  end
+end