{"id":20690750,"url":"https://github.com/levsh/pydantic_view","last_synced_at":"2026-04-23T10:34:56.197Z","repository":{"id":158359957,"uuid":"631318427","full_name":"levsh/pydantic_view","owner":"levsh","description":"A helper view decorator to construct the child pydantic 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returned=1 errno=0 peeraddr=140.82.121.5:443 state=error: unexpected eof while reading","robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":false,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":[],"created_at":"2024-11-16T23:14:09.291Z","updated_at":"2026-04-23T10:34:56.179Z","avatar_url":"https://github.com/levsh.png","language":"Python","funding_links":[],"categories":[],"sub_categories":[],"readme":"# Pydantic view helper decorator\n\n[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)\n\n### Installation\n```bash\npip install pydantic_view\n```\n\n### Usage\n\n```python\nIn [1]: from pydantic import BaseModel, Field\n   ...: from pydantic_view import view\n   ...: \n   ...: \n   ...: class User(BaseModel):\n   ...:     id: int\n   ...:     username: str\n   ...:     password: str\n   ...:     address: str\n   ...: \n   ...: @view(\"Create\", exclude={\"id\"})\n   ...: class UserCreate(User):\n   ...:     pass\n   ...:\n   ...: @view(\"Update\")\n   ...: class UserUpdate(User):\n   ...:     pass\n   ...:\n   ...: @view(\"Patch\")\n   ...: class UserPatch(User):\n   ...:     username: str = None\n   ...:     password: str = None\n   ...:     address: str = None\n   ...:\n   ...: @view(\"Out\", exclude={\"password\"})\n   ...: class UserOut(User):\n   ...:     pass\n\nIn [2]: user = User(id=0, username=\"human\", password=\"iamaman\", address=\"Earth\")\n   ...: user.Out()\n   ...: \nOut[2]: UserOut(id=0, username='human', address='Earth')\n\nIn [3]: User.Update(id=0, username=\"human\", password=\"iamasuperman\", address=\"Earth\")\n   ...: \nOut[3]: UserUpdate(id=0, username='human', password='iamasuperman', address='Earth')\n\nIn [4]: User.Patch(id=0, address=\"Mars\")\n   ...: \nOut[4]: UserPatch(id=0, username=None, password=None, address='Mars')\n```\n\n\n### FastAPI example\n\n```python\nfrom typing import Optional\n\nfrom fastapi import FastAPI\nfrom fastapi.testclient import TestClient\nfrom pydantic import BaseModel, ConfigDict, Field\n\nfrom pydantic_view import view, view_field_validator\n\n\nclass UserSettings(BaseModel):\n    model_config = ConfigDict(extra=\"forbid\")\n\n    public: Optional[str] = None\n    secret: Optional[str] = None\n\n\n@view(\"Out\", exclude={\"secret\"})\nclass UserSettingsOut(UserSettings):\n    pass\n\n\n@view(\"Create\")\nclass UserSettingsCreate(UserSettings):\n    pass\n\n\n@view(\"Update\")\nclass UserSettingsUpdate(UserSettings):\n    pass\n\n\n@view(\"Patch\")\nclass UserSettingsPatch(UserSettings):\n    public: str = None\n    secret: str = None\n\n\nclass User(BaseModel):\n    model_config = ConfigDict(extra=\"forbid\")\n\n    id: int\n    username: str\n    password: str = Field(default_factory=lambda: \"password\")\n    settings: UserSettings\n\n    @view_field_validator({\"Create\", \"Update\", \"Patch\"}, \"username\")\n    @classmethod\n    def validate_username(cls, v):\n        if len(v) \u003c 3:\n            raise ValueError\n        return v\n\n\n@view(\"Out\", exclude={\"password\"})\nclass UserOut(User):\n    pass\n\n\n@view(\"Create\", exclude={\"id\"})\nclass UserCreate(User):\n    settings: UserSettings = Field(default_factory=UserSettings)\n\n\n@view(\"Update\", exclude={\"id\"})\nclass UserUpdate(User):\n    pass\n\n\n@view(\"Patch\", exclude={\"id\"})\nclass UserPatch(User):\n    username: str = None\n    password: str = None\n    settings: UserSettings = None\n\n\napp = FastAPI()\n\ndb = {}\n\n\n@app.get(\"/users/{user_id}\", response_model=User.Out)\nasync def get(user_id: int) -\u003e User.Out:\n    return db[user_id]\n\n\n@app.post(\"/users\", response_model=User.Out)\nasync def post(user: User.Create) -\u003e User.Out:\n    user_id = 0  # generate_user_id()\n    db[0] = User(id=user_id, **user.model_dump())\n    return db[0]\n\n\n@app.put(\"/users/{user_id}\", response_model=User.Out)\nasync def put(user_id: int, user: User.Update) -\u003e User.Out:\n    db[user_id] = User(id=user_id, **user.model_dump())\n    return db[user_id]\n\n\n@app.patch(\"/users/{user_id}\", response_model=User.Out)\nasync def patch(user_id: int, user: User.Patch) -\u003e User.Out:\n    db[user_id] = User(**{**db[user_id].model_dump(), **user.model_dump(exclude_unset=True)})\n    return db[user_id]\n\n\ndef test_fastapi():\n    client = TestClient(app)\n\n    # POST\n    response = client.post(\n        \"/users\",\n        json={\n            \"username\": \"admin\",\n            \"password\": \"admin\",\n        },\n    )\n    assert response.status_code == 200, response.text\n    assert response.json() == {\n        \"id\": 0,\n        \"username\": \"admin\",\n        \"settings\": {\"public\": None},\n    }\n\n    # GET\n    response = client.get(\"/users/0\")\n    assert response.status_code == 200, response.text\n    assert response.json() == {\n        \"id\": 0,\n        \"username\": \"admin\",\n        \"settings\": {\"public\": None},\n    }\n\n    # PUT\n    response = client.put(\n        \"/users/0\",\n        json={\n            \"username\": \"superadmin\",\n            \"password\": \"superadmin\",\n            \"settings\": {\"public\": \"foo\", \"secret\": \"secret\"},\n        },\n    )\n    assert response.status_code == 200, response.text\n    assert response.json() == {\n        \"id\": 0,\n        \"username\": \"superadmin\",\n        \"settings\": {\"public\": \"foo\"},\n    }\n\n    # PATCH\n    response = client.patch(\n        \"/users/0\",\n        json={\n            \"username\": \"guest\",\n            \"settings\": {\"public\": \"bar\"},\n        },\n    )\n    assert response.status_code == 200, response.text\n    assert response.json() == {\n        \"id\": 0,\n        \"username\": \"guest\",\n        \"settings\": {\"public\": \"bar\"},\n    }\n```\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Flevsh%2Fpydantic_view","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Flevsh%2Fpydantic_view","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Flevsh%2Fpydantic_view/lists"}