Update docs

Author: denisart

docs/from_data_model.md

@@ -19,4 +19,70 @@ assert generated == [
     Field(name="name", fields=[]),
     Field(name="friends", fields=[Field(name="name", fields=[])]),
 ]
+
+Field(name="human", fields=generated).render()
+"""human {
+  name
+  height(
+    unit: FOOT
+  )
+}"""
+```
+
+We can use arguments for your queries
+
+```python
+from pydantic import Field as PydanticField
+from graphql_query import Argument, Field, GraphQLQueryBaseModel
+
+class Human(GraphQLQueryBaseModel):
+    name: str
+    height: float = PydanticField(graphql_arguments=[Argument(name="unit", value="FOOT")])
+
+generated = Human.graphql_fields()
+
+assert generated == [
+  Field(name="name", fields=[]), Field(name="height", arguments=[Argument(name="unit", value="FOOT")])
+]
+
+Field(name="human", fields=generated).render()
+"""human {
+  name
+  height(
+    unit: FOOT
+  )
+}"""
+```
+
+For multiply union we have inline fragments
+
+```python
+from typing import Union
+from graphql_query import Field, GraphQLQueryBaseModel, InlineFragment
+
+class Droid(GraphQLQueryBaseModel):
+    primaryFunction: str
+
+class Human(GraphQLQueryBaseModel):
+    height: float
+
+class Hero(GraphQLQueryBaseModel):
+    name: str
+    type: Union[Human, Droid]
+
+
+generated = Hero.graphql_fields()
+
+Field(name="hero", fields=generated).render()
+"""hero {
+  name
+  type {
+    ... on Human {
+      height
+    }
+    ... on Droid {
+      primaryFunction
+    }
+  }
+}"""
 ```

graphql_query/__version__.py

@@ -1 +1 @@
-__version__ = "1.2.1"
+__version__ = "1.2.2"