Improved basic types page

Author: syrusakbary

docs/pages/docs/basic-types.md

@@ -5,17 +5,59 @@ description: Walkthrough Basic Types
 
 # Basic Types
 
-Graphene define the following base Types:
+Graphene define the following base Scalar Types:
 - `graphene.String`
 - `graphene.Int`
 - `graphene.Float`
 - `graphene.Boolean`
 - `graphene.ID`
 
-Also, define:
+Also the following Types are available:
 - `graphene.List`
 - `graphene.NonNull`
 
+## Shorcuts
+
+There are some shorcuts for code easier.
+The following are equivalent
+
+```python
+# A list of strings
+string_list = graphene.List(graphene.String())
+string_list = graphene.String().List
+
+# A non-null string
+string_non_null = graphene.String().NonNull
+string_non_null = graphene.NonNull(graphene.String())
+```
+
+
+## Custom scalars
+
+You can also create a custom scalar for your schema.
+If you want to create a DateTime Scalar Type just type:
+
+```python
+import datetime
+from graphql.core.language import ast
+
+class DateTime(Scalar):
+    '''DateTime'''
+    @staticmethod
+    def serialize(dt):
+        return dt.isoformat()
+
+    @staticmethod
+    def parse_literal(node):
+        if isinstance(node, ast.StringValue):
+            return datetime.datetime.strptime(
+                node.value, "%Y-%m-%dT%H:%M:%S.%f")
+
+    @staticmethod
+    def parse_value(value):
+        return datetime.datetime.strptime(value, "%Y-%m-%dT%H:%M:%S.%f")
+```
+
 ## Mounting in ClassTypes
 
 This types if are mounted in a `ObjectType`, `Interface` or `Mutation`,
@@ -39,14 +81,10 @@ If this types are mounted in a `Field`, would act as `Argument`s.
 So, the following examples will behave exactly the same:
 
 ```python
-class Person(graphene.ObjectType):
-    say_hello = graphene.Field(graphene.String(),
-                               to=graphene.String())
+graphene.Field(graphene.String(), to=graphene.String())
 ```
 and
 
 ```python
-class Person(graphene.ObjectType):
-    say_hello = graphene.Field(graphene.String(),
-                               to=graphene.Argument(graphene.String()))
+graphene.Field(graphene.String(), to=graphene.Argument(graphene.String()))
 ```