Fix description function calls

lib/absinthe/schema/notation.ex

@@ -212,7 +212,12 @@ defmodule Absinthe.Schema.Notation do
 
     __CALLER__
     |> recordable!(:object, @placement[:object])
-    |> record!(Schema.ObjectTypeDefinition, identifier, attrs, block)
+    |> record!(
+      Schema.ObjectTypeDefinition,
+      identifier,
+      attrs |> Keyword.update(:description, nil, &wrap_in_unquote/1),
+      block
+    )
   end
 
   @placement {:interfaces, [under: [:object]]}
@@ -407,6 +412,7 @@ defmodule Absinthe.Schema.Notation do
       |> expand_ast(caller)
       |> Keyword.delete(:args)
       |> Keyword.delete(:meta)
+      |> Keyword.update(:description, nil, &wrap_in_unquote/1)
       |> handle_deprecate
 
     {attrs, block}
@@ -719,7 +725,7 @@ defmodule Absinthe.Schema.Notation do
   defmacro scalar(identifier, attrs, do: block) do
     __CALLER__
     |> recordable!(:scalar, @placement[:scalar])
-    |> record!(Schema.ScalarTypeDefinition, identifier, attrs, block)
+    |> record_scalar!(identifier, attrs, block)
   end
 
   @doc """
@@ -730,13 +736,13 @@ defmodule Absinthe.Schema.Notation do
   defmacro scalar(identifier, do: block) do
     __CALLER__
     |> recordable!(:scalar, @placement[:scalar])
-    |> record!(Schema.ScalarTypeDefinition, identifier, [], block)
+    |> record_scalar!(identifier, [], block)
   end
 
   defmacro scalar(identifier, attrs) do
     __CALLER__
     |> recordable!(:scalar, @placement[:scalar])
-    |> record!(Schema.ScalarTypeDefinition, identifier, attrs, nil)
+    |> record_scalar!(identifier, attrs, nil)
   end
 
   @placement {:serialize, [under: [:scalar]]}
@@ -934,7 +940,12 @@ defmodule Absinthe.Schema.Notation do
   defmacro input_object(identifier, attrs \\ [], do: block) do
     __CALLER__
     |> recordable!(:input_object, @placement[:input_object])
-    |> record!(Schema.InputObjectTypeDefinition, identifier, attrs, block)
+    |> record!(
+      Schema.InputObjectTypeDefinition,
+      identifier,
+      attrs |> Keyword.update(:description, nil, &wrap_in_unquote/1),
+      block
+    )
   end
 
   # UNIONS
@@ -965,7 +976,12 @@ defmodule Absinthe.Schema.Notation do
   defmacro union(identifier, attrs \\ [], do: block) do
     __CALLER__
     |> recordable!(:union, @placement[:union])
-    |> record!(Schema.UnionTypeDefinition, identifier, attrs, block)
+    |> record!(
+      Schema.UnionTypeDefinition,
+      identifier,
+      attrs |> Keyword.update(:description, nil, &wrap_in_unquote/1),
+      block
+    )
   end
 
   @placement {:types, [under: [:union]]}
@@ -1069,10 +1085,11 @@ defmodule Absinthe.Schema.Notation do
     |> expand_ast(env)
     |> Keyword.update(:values, [], fn values ->
       Enum.map(values, fn ident ->
-        value_attrs = handle_enum_value_attrs(ident, module: env.module)
+        value_attrs = handle_enum_value_attrs(ident, [], env)
         struct!(Schema.EnumValueDefinition, value_attrs)
       end)
     end)
+    |> Keyword.update(:description, nil, &wrap_in_unquote/1)
   end
 
   @placement {:value, [under: [:enum]]}
@@ -1296,6 +1313,7 @@ defmodule Absinthe.Schema.Notation do
     raw_attrs
     |> Keyword.put_new(:name, to_string(identifier))
     |> Keyword.put_new(:type, type)
+    |> Keyword.update(:description, nil, &wrap_in_unquote/1)
     |> handle_deprecate
   end
 
@@ -1319,6 +1337,7 @@ defmodule Absinthe.Schema.Notation do
       attrs
       |> Keyword.put(:identifier, identifier)
       |> Keyword.put_new(:name, to_string(identifier))
+      |> Keyword.update(:description, nil, &wrap_in_unquote/1)
 
     scoped_def(env, Schema.DirectiveDefinition, identifier, attrs, block)
   end
@@ -1401,16 +1420,27 @@ defmodule Absinthe.Schema.Notation do
     scoped_def(env, :enum, identifier, attrs, block)
   end
 
-  defp reformat_description(text), do: String.trim(text)
-
   @doc false
   # Record a description in the current scope
   def record_description!(env, text_block) do
-    text = reformat_description(text_block)
+    text = wrap_in_unquote(text_block)
+
     put_attr(env.module, {:desc, text})
   end
 
-  def handle_enum_value_attrs(identifier, raw_attrs) do
+  @doc false
+  # Record a scalar
+  def record_scalar!(env, identifier, attrs, block_or_nil) do
+    record!(
+      env,
+      Schema.ScalarTypeDefinition,
+      identifier,
+      attrs |> Keyword.update(:description, nil, &wrap_in_unquote/1),
+      block_or_nil
+    )
+  end
+
+  def handle_enum_value_attrs(identifier, raw_attrs, env) do
     value =
       case Keyword.get(raw_attrs, :as, identifier) do
         value when is_tuple(value) ->
@@ -1423,18 +1453,19 @@ defmodule Absinthe.Schema.Notation do
       end
 
     raw_attrs
-    |> expand_ast(raw_attrs)
+    |> expand_ast(env)
     |> Keyword.put(:identifier, identifier)
     |> Keyword.put(:value, value)
     |> Keyword.put_new(:name, String.upcase(to_string(identifier)))
     |> Keyword.delete(:as)
+    |> Keyword.update(:description, nil, &wrap_in_unquote/1)
     |> handle_deprecate
   end
 
   @doc false
   # Record an enum value in the current scope
   def record_value!(env, identifier, raw_attrs) do
-    attrs = handle_enum_value_attrs(identifier, raw_attrs)
+    attrs = handle_enum_value_attrs(identifier, raw_attrs, env)
     record!(env, Schema.EnumValueDefinition, identifier, attrs, [])
   end
 
@@ -1445,7 +1476,7 @@ defmodule Absinthe.Schema.Notation do
       values
       |> expand_ast(env)
       |> Enum.map(fn ident ->
-        value_attrs = handle_enum_value_attrs(ident, module: env.module)
+        value_attrs = handle_enum_value_attrs(ident, [], env)
         struct!(Schema.EnumValueDefinition, value_attrs)
       end)
 
@@ -1484,6 +1515,14 @@ defmodule Absinthe.Schema.Notation do
     put_attr(env.module, {:middleware, [new_middleware]})
   end
 
+  # We wrap the value (from the user) in an `unquote` call, so that when the schema `blueprint` is
+  # placed into `__absinthe_blueprint__` via `unquote(Macro.escape(blueprint, unquote: true))` the
+  # value get's unquoted. This allows us to evaluate function calls in the scope of the schema
+  # module.
+  defp wrap_in_unquote(value) do
+    {:unquote, [], [value]}
+  end
+
   # ------------------------------
 
   @doc false
@@ -1866,6 +1905,18 @@ defmodule Absinthe.Schema.Notation do
 
   defp expand_ast(ast, env) do
     Macro.prewalk(ast, fn
+      # We don't want to expand `@bla` into `Module.get_attribute(module, @bla)` because this
+      # function call will fail if the module is already compiled. Remember that the ast gets put
+      # into a generated `__absinthe_blueprint__` function which is called at "__after_compile__"
+      # time. This will be after a module has been compiled if there are multiple modules in the
+      # schema (in the case of an `import_types`).
+      #
+      # Also see test "test/absinthe/type/import_types_test.exs"
+      # "__absinthe_blueprint__ is callable at runtime even if there is a module attribute"
+      # and it's comment for more information
+      {:@, _, _} = node ->
+        node
+
       {_, _, _} = node ->
         Macro.expand(node, env)
 

test/absinthe/execution/arguments/scalar_test.exs

@@ -1,6 +1,8 @@
 defmodule Absinthe.Execution.Arguments.ScalarTest do
   use Absinthe.Case, async: true
+
   alias Absinthe.Blueprint.Input
+  alias Absinthe.Fixtures.Scalar
 
   @schema Absinthe.Fixtures.ArgumentsSchema
 
@@ -58,4 +60,45 @@ defmodule Absinthe.Execution.Arguments.ScalarTest do
       )
     end
   end
+
+  describe "scalar keyword description evaluation" do
+    Absinthe.Fixtures.FunctionEvaluationHelpers.function_evaluation_test_params()
+    |> Enum.each(fn %{
+                      test_label: test_label,
+                      expected_value: expected_value
+                    } ->
+      test "for #{test_label} (evaluates description to '#{expected_value}')" do
+        type = Scalar.TestSchemaDescriptionKeyword.__absinthe_type__(unquote(test_label))
+        assert type.description == unquote(expected_value)
+      end
+    end)
+  end
+
+  describe "scalar description attribute evaluation" do
+    Absinthe.Fixtures.FunctionEvaluationHelpers.function_evaluation_test_params()
+    |> Absinthe.Fixtures.FunctionEvaluationHelpers.filter_test_params_for_description_attribute()
+    |> Enum.each(fn %{
+                      test_label: test_label,
+                      expected_value: expected_value
+                    } ->
+      test "for #{test_label} (evaluates description to '#{expected_value}')" do
+        type = Scalar.TestSchemaDescriptionAttribute.__absinthe_type__(unquote(test_label))
+
+        assert type.description == unquote(expected_value)
+      end
+    end)
+  end
+
+  describe "scalar description macro evaluation" do
+    Absinthe.Fixtures.FunctionEvaluationHelpers.function_evaluation_test_params()
+    |> Enum.each(fn %{
+                      test_label: test_label,
+                      expected_value: expected_value
+                    } ->
+      test "for #{test_label} (evaluates description to '#{expected_value}')" do
+        type = Scalar.TestSchemaDescriptionMacro.__absinthe_type__(unquote(test_label))
+        assert type.description == unquote(expected_value)
+      end
+    end)
+  end
 end

test/absinthe/type/directive_test.exs

@@ -2,6 +2,7 @@ defmodule Absinthe.Type.DirectiveTest do
   use Absinthe.Case, async: true
 
   alias Absinthe.Schema
+  alias Absinthe.Fixtures.Directive
 
   defmodule TestSchema do
     use Absinthe.Schema
@@ -224,4 +225,61 @@ defmodule Absinthe.Type.DirectiveTest do
                Absinthe.run(@query, Absinthe.Fixtures.ContactSchema)
     end
   end
+
+  describe "directive keyword description evaluation" do
+    Absinthe.Fixtures.FunctionEvaluationHelpers.function_evaluation_test_params()
+    |> Enum.each(fn %{
+                      test_label: test_label,
+                      expected_value: expected_value
+                    } ->
+      test "for #{test_label} (evaluates description to '#{expected_value}')" do
+        type = Directive.TestSchemaDescriptionKeyword.__absinthe_directive__(unquote(test_label))
+        assert type.description == unquote(expected_value)
+      end
+    end)
+  end
+
+  describe "directive description attribute evaluation" do
+    Absinthe.Fixtures.FunctionEvaluationHelpers.function_evaluation_test_params()
+    |> Absinthe.Fixtures.FunctionEvaluationHelpers.filter_test_params_for_description_attribute()
+    |> Enum.each(fn %{
+                      test_label: test_label,
+                      expected_value: expected_value
+                    } ->
+      test "for #{test_label} (evaluates description to '#{expected_value}')" do
+        type =
+          Directive.TestSchemaDescriptionAttribute.__absinthe_directive__(unquote(test_label))
+
+        assert type.description == unquote(expected_value)
+      end
+    end)
+  end
+
+  describe "directive description macro evaluation" do
+    Absinthe.Fixtures.FunctionEvaluationHelpers.function_evaluation_test_params()
+    |> Enum.each(fn %{
+                      test_label: test_label,
+                      expected_value: expected_value
+                    } ->
+      test "for #{test_label} (evaluates description to '#{expected_value}')" do
+        type = Directive.TestSchemaDescriptionMacro.__absinthe_directive__(unquote(test_label))
+        assert type.description == unquote(expected_value)
+      end
+    end)
+  end
+
+  describe "directive arg keyword description evaluation" do
+    Absinthe.Fixtures.FunctionEvaluationHelpers.function_evaluation_test_params()
+    |> Enum.each(fn %{
+                      test_label: test_label,
+                      expected_value: expected_value
+                    } ->
+      test "for #{test_label} (evaluates description to '#{expected_value}')" do
+        type =
+          Directive.TestSchemaArgDescriptionKeyword.__absinthe_directive__(unquote(test_label))
+
+        assert type.args[:arg_example].description == unquote(expected_value)
+      end
+    end)
+  end
 end

test/absinthe/type/enum_test.exs

@@ -2,6 +2,7 @@ defmodule Absinthe.Type.EnumTest do
   use Absinthe.Case, async: true
 
   alias Absinthe.Type
+  alias Absinthe.Fixtures.Enums
 
   defmodule TestSchema do
     use Absinthe.Schema
@@ -71,4 +72,59 @@ defmodule Absinthe.Type.EnumTest do
       assert %Type.Enum.Value{name: "RED", value: :red, description: nil} = type.values[:red]
     end
   end
+
+  describe "enum value description evaluation" do
+    Absinthe.Fixtures.FunctionEvaluationHelpers.function_evaluation_test_params()
+    |> Enum.each(fn %{
+                      test_label: test_label,
+                      expected_value: expected_value
+                    } ->
+      test "for #{test_label} (evaluates description to '#{expected_value}')" do
+        type =
+          Enums.TestSchemaValueDescriptionKeyword.__absinthe_type__(:description_keyword_argument)
+
+        assert type.values[unquote(test_label)].description == unquote(expected_value)
+      end
+    end)
+  end
+
+  describe "enum description keyword evaluation" do
+    Absinthe.Fixtures.FunctionEvaluationHelpers.function_evaluation_test_params()
+    |> Enum.each(fn %{
+                      test_label: test_label,
+                      expected_value: expected_value
+                    } ->
+      test "for #{test_label} (evaluates description to '#{expected_value}')" do
+        type = Enums.TestSchemaDescriptionKeyword.__absinthe_type__(unquote(test_label))
+        assert type.description == unquote(expected_value)
+      end
+    end)
+  end
+
+  describe "enum description attribute evaluation" do
+    Absinthe.Fixtures.FunctionEvaluationHelpers.function_evaluation_test_params()
+    |> Absinthe.Fixtures.FunctionEvaluationHelpers.filter_test_params_for_description_attribute()
+    |> Enum.each(fn %{
+                      test_label: test_label,
+                      expected_value: expected_value
+                    } ->
+      test "for #{test_label} (evaluates description to '#{expected_value}')" do
+        type = Enums.TestSchemaDescriptionAttribute.__absinthe_type__(unquote(test_label))
+        assert type.description == unquote(expected_value)
+      end
+    end)
+  end
+
+  describe "enum description macro evaluation" do
+    Absinthe.Fixtures.FunctionEvaluationHelpers.function_evaluation_test_params()
+    |> Enum.each(fn %{
+                      test_label: test_label,
+                      expected_value: expected_value
+                    } ->
+      test "for #{test_label} (evaluates description to '#{expected_value}')" do
+        type = Enums.TestSchemaDescriptionMacro.__absinthe_type__(unquote(test_label))
+        assert type.description == unquote(expected_value)
+      end
+    end)
+  end
 end