Release v0.5.3

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Changelog
 
+## 0.5.3
+
+- Bug Fix: [Handle resolving `nil` for entity references](https://github.com/DivvyPayHQ/absinthe_federation/pull/98)
+
 ## 0.5.2
 
 - Feature: [Support `@interfaceObject` directive](https://github.com/DivvyPayHQ/absinthe_federation/pull/96)

mix.exs

@@ -2,7 +2,7 @@ defmodule Absinthe.Federation.MixProject do
   use Mix.Project
 
   @source_url "https://github.com/DivvyPayHQ/absinthe_federation"
-  @version "0.5.2"
+  @version "0.5.3"
 
   def project do
     [

test/absinthe/federation/schema/entities_field_test.exs

@@ -55,6 +55,13 @@ defmodule Absinthe.Federation.Schema.EntitiesFieldTest do
       object :product do
         key_fields("upc")
         field :upc, non_null(:string)
+
+        field :name, :string,
+          resolve: fn
+            %{upc: "789-erroneous-name"}, _, _ -> {:error, "arbitrary name error"}
+            %{upc: upc}, _, _ -> {:ok, "product #{upc}"}
+          end
+
         field :foo, non_null(:string), resolve: fn _, _, _ -> {:ok, "bar"} end
 
         field :_resolve_reference, :product do
@@ -63,6 +70,7 @@ defmodule Absinthe.Federation.Schema.EntitiesFieldTest do
               case upc do
                 "123" -> {:ok, args}
                 "456" -> {:ok, args}
+                "789-erroneous-name" -> {:ok, args}
                 "nil" <> _ -> {:ok, nil}
                 _ -> {:error, "Couldn't find product with upc #{upc}"}
               end
@@ -146,6 +154,43 @@ defmodule Absinthe.Federation.Schema.EntitiesFieldTest do
              } = resp
     end
 
+    test "handles errors alongside data" do
+      query = """
+        query {
+          _entities(representations: [
+            {
+              __typename: "Product",
+              upc: "789-erroneous-name"
+            },
+            {
+              __typename: "Product",
+              upc: "456"
+            }
+          ]) {
+            ...on Product {
+              upc
+              foo
+              name
+            }
+          }
+        }
+      """
+
+      {:ok, resp} = Absinthe.run(query, ResolverSchema, variables: %{})
+
+      assert %{
+               data: %{
+                 "_entities" => [
+                   %{"foo" => "bar", "name" => nil, "upc" => "789-erroneous-name"},
+                   %{"foo" => "bar", "name" => "product 456", "upc" => "456"}
+                 ]
+               },
+               errors: [
+                 %{message: "arbitrary name error", path: ["_entities", 0, "name"], locations: [%{column: 9, line: 15}]}
+               ]
+             } == resp
+    end
+
     test "Handles missing data" do
       query = """
         query {
@@ -175,6 +220,39 @@ defmodule Absinthe.Federation.Schema.EntitiesFieldTest do
              } = resp
     end
 
+    test "Handles missing data alongside existing data" do
+      query = """
+        query {
+          _entities(representations: [
+            {
+              __typename: "Product",
+              upc: "nil1"
+            },
+            {
+              __typename: "Product",
+              upc: "nil22"
+            },
+            {
+              __typename: "Product",
+              upc: "456"
+            }
+          ]) {
+            __typename
+            ...on Product {
+              upc
+              foo
+            }
+          }
+        }
+      """
+
+      {:ok, resp} = Absinthe.run(query, ResolverSchema, variables: %{})
+
+      assert %{
+               data: %{"_entities" => [nil, nil, %{"__typename" => "Product", "foo" => "bar", "upc" => "456"}]}
+             } = resp
+    end
+
     test "falls back to default _resolve_reference implementation" do
       query = """
         query {

test/absinthe/federation/schema/persistent_term_schema_entity_field_test.exs

@@ -15,16 +15,15 @@ defmodule Absinthe.Federation.Schema.PersistentTermSchemaEntityFieldTest do
       key_fields("name")
 
       field :name, :string do
-        resolve(fn %{name: name}, _, _ ->
-          {:ok, name}
-        end)
+        resolve(fn %{name: name}, _, _ -> {:ok, name} end)
       end
 
       resolve_type(&resolve_type/2)
 
       field :_resolve_reference, :named_entity do
         resolve(fn
-          _, %{name: "John"}, _ -> {:ok, %{__typename: "Person", name: "John", age: 20}}
+          _, %{name: "John"}, _ -> {:ok, %{__typename: "Person", name: "John"}}
+          _, %{name: "error on age" <> _ = name}, _ -> {:ok, %{__typename: "Person", name: name}}
           _, %{name: "Acme"}, _ -> {:ok, %{__typename: "Business", name: "Acme", employee_count: 10}}
           _, %{name: "nil" <> _}, _ -> {:ok, nil}
         end)
@@ -40,7 +39,13 @@ defmodule Absinthe.Federation.Schema.PersistentTermSchemaEntityFieldTest do
 
       interface :named_entity
       import_fields(:named_entity, [:name, :_resolve_reference])
-      field :age, :integer
+
+      field :age, :integer do
+        resolve(fn
+          %{name: "error on age" <> _ = error}, _, _ -> {:error, error}
+          %{name: _name}, _, _ -> {:ok, 20}
+        end)
+      end
     end
 
     object :business do
@@ -119,4 +124,45 @@ defmodule Absinthe.Federation.Schema.PersistentTermSchemaEntityFieldTest do
              }
            } = resp
   end
+
+  test "Handles errors alongside data" do
+    query = """
+      query {
+        _entities(representations: [
+          { __typename: "NamedEntity", name: "John" },
+          { __typename: "NamedEntity", name: "error on age 1" },
+          { __typename: "NamedEntity", name: "error on age 2" }
+        ]) {
+          ...on NamedEntity {
+            __typename
+            name
+            ... on Person {
+              age
+            }
+            ... on Business {
+              employeeCount
+            }
+          }
+        }
+      }
+    """
+
+    {:ok, resp} = Absinthe.run(query, EntitySchemaWithPersistentTermProvider, variables: %{})
+
+    assert %{
+             data: %{
+               "_entities" => [
+                 %{"__typename" => "Person", "age" => 20, "name" => "John"},
+                 %{"__typename" => "Person", "age" => nil, "name" => "error on age 1"},
+                 %{"__typename" => "Person", "age" => nil, "name" => "error on age 2"}
+               ]
+             },
+             errors: errors
+           } = resp
+
+    assert errors == [
+             %{message: "error on age 2", path: ["_entities", 2, "age"], locations: [%{line: 11, column: 11}]},
+             %{message: "error on age 1", path: ["_entities", 1, "age"], locations: [%{line: 11, column: 11}]}
+           ]
+  end
 end