Updated model file

Author: Youngestdev

ch04/todos/model.py

@@ -0,0 +1,53 @@
+from typing import List, Optional
+
+from fastapi import Form
+from pydantic import BaseModel
+
+
+class Todo(BaseModel):
+    id: Optional[int]
+    item: str
+
+    @classmethod
+    def as_form(
+            cls,
+            item: str = Form(...)
+    ):
+        return cls(item=item)
+
+    class Config:
+        schema_extra = {
+            "example": {
+                "id": 1,
+                "item": "Example schema!"
+            }
+        }
+
+
+class TodoItem(BaseModel):
+    item: str
+
+    class Config:
+        schema_extra = {
+            "example": {
+                "item": "Read the next chapter of the book"
+            }
+        }
+
+
+class TodoItems(BaseModel):
+    todos: List[TodoItem]
+
+    class Config:
+        schema_extra = {
+            "example": {
+                "todos": [
+                    {
+                        "item": "Example schema 1!"
+                    },
+                    {
+                        "item": "Example schema 2!"
+                    }
+                ]
+            }
+        }