feat: Add flask example.

Author: abawchen

examples/flask_mongoengine/README.md

@@ -0,0 +1,34 @@
+from database import init_db
+from flask import Flask
+from flask_graphql import GraphQLView
+from schema import schema
+
+app = Flask(__name__)
+app.debug = True
+
+default_query = '''
+{
+  allEmployees {
+    edges {
+      node {
+        id,
+        name,
+        department {
+          id,
+          name
+        },
+        role {
+          id,
+          name
+        }
+      }
+    }
+  }
+}'''.strip()
+
+app.add_url_rule('/graphql', view_func=GraphQLView.as_view('graphql', schema=schema, graphiql=True))
+
+if __name__ == '__main__':
+    init_db()
+    app.run()
+

examples/flask_mongoengine/__init__.py

@@ -0,0 +1,30 @@
+from mongoengine import connect
+
+from models import Department, Employee, Role
+
+connect('graphene-mongo-example', host='mongomock://localhost', alias='default')
+
+
+def init_db():
+    # Create the fixtures
+    engineering = Department(name='Engineering')
+    engineering.save()
+
+    hr = Department(name='Human Resources')
+    hr.save()
+
+    manager = Role(name='manager')
+    manager.save()
+
+    engineer = Role(name='engineer')
+    engineer.save()
+
+    peter = Employee(name='Peter', department=engineering, role=engineer)
+    peter.save()
+
+    roy = Employee(name='Roy', department=engineering, role=engineer)
+    roy.save()
+
+    tracy = Employee(name='Tracy', department=hr, role=manager)
+    tracy.save()
+

examples/flask_mongoengine/app.py

@@ -0,0 +1,24 @@
+from datetime import datetime
+from mongoengine import Document
+from mongoengine.fields import (
+    DateTimeField, ReferenceField, StringField,
+)
+
+
+class Department(Document):
+    meta = {'collection': 'department'}
+    name = StringField()
+
+
+class Role(Document):
+    meta = {'collection': 'role'}
+    name = StringField()
+
+
+class Employee(Document):
+    meta = {'collection': 'employee'}
+    name = StringField()
+    hired_on = DateTimeField(default=datetime.now)
+    department = ReferenceField(Department)
+    role = ReferenceField(Role)
+

examples/flask_mongoengine/database.py

@@ -0,0 +1,5 @@
+Flask==0.12.2
+Flask-GraphQL==1.4.1
+graphene-mongo==0.1.1
+mongomock==3.8.0
+

examples/flask_mongoengine/models.py

@@ -0,0 +1,36 @@
+import graphene
+from graphene.relay import Node
+from graphene_mongo import MongoengineConnectionField, MongoengineObjectType
+from models import Department as DepartmentModel
+from models import Employee as EmployeeModel
+from models import Role as RoleModel
+
+class Department(MongoengineObjectType):
+
+    class Meta:
+        model = DepartmentModel
+        interfaces = (Node,)
+
+
+class Role(MongoengineObjectType):
+
+    class Meta:
+        model = RoleModel
+        interfaces = (Node,)
+
+
+class Employee(MongoengineObjectType):
+
+    class Meta:
+        model = EmployeeModel
+        interfaces = (Node,)
+
+
+class Query(graphene.ObjectType):
+    node = Node.Field()
+    all_employees = MongoengineConnectionField(Employee)
+    all_role = MongoengineConnectionField(Role)
+    role = graphene.Field(Role)
+
+schema = graphene.Schema(query=Query, types=[Department, Employee, Role])
+