Example Union

Author: Oisins

docs/examples.rst

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+Schema Examples
+===========================
+
+
+Search all Models with Union
+-----------------
+
+.. code:: python
+
+    class Book(SQLAlchemyObjectType):
+        class Meta:
+            model = BookModel
+            interfaces = (relay.Node,)
+    
+    
+    class Author(SQLAlchemyObjectType):
+        class Meta:
+            model = AuthorModel
+            interfaces = (relay.Node,)
+
+
+    class SearchResult(graphene.Union):
+        class Meta:
+            types = (Book, Author)
+
+
+    class Query(graphene.ObjectType):
+        node = relay.Node.Field()
+        search = graphene.List(SearchResult, q=graphene.String())  # List field for search results
+        
+        # Normal Fields
+        all_books = SQLAlchemyConnectionField(Book)
+        all_authors = SQLAlchemyConnectionField(Author)
+
+        def resolve_search(self, info, **args):
+            q = args.get("q")  # Search query
+            
+            # Get queries
+            bookdata_query = BookData.get_query(info)
+            author_query = Author.get_query(info)
+
+            # Query Books
+            books = bookdata_query.filter((BookModel.title.contains(q)) |
+                                          (BookModel.isbn.contains(q)) |
+                                          (BookModel.authors.any(AuthorModel.name.contains(q)))).all()
+            
+            # Query Authors
+            authors = author_query.filter(AuthorModel.name.contains(q)).all()
+
+        return authors + books  # Combine lists
+
+    schema = graphene.Schema(query=Query, types=[Book, Author, SearchResult])
+    
+Example GraphQL query
+
+.. code:: GraphQL
+
+    book(id: "Qm9vazow") {
+        id
+        title
+    }
+    search(q: "Making Games") {
+        __typename
+        ... on Author {
+            fname
+            lname
+        }
+        ... on Book {
+            title
+            isbn
+        }
+    }