# flask-marshmallow
序列化和反序列化，支持 JSON、YAML 和 XML 等


## Usage
```
from flask import Flask, request, jsonify
from flask_marshmallow import Marshmallow

app = Flask(__name__)
ma = Marshmallow(app)

# 定义数据模型类
class User:
    def __init__(self, id, username, email):
        self.id = id
        self.username = username
        self.email = email

# 定义序列化器类
class UserSchema(ma.Schema):
    class Meta:
        fields = ('id', 'username', 'email')

# 创建用户数据
users_data = [
    User(id=1, username='john_doe', email='john@example.com'),
    User(id=2, username='jane_doe', email='jane@example.com')
]

# 创建用户数据模式实例
user_schema = UserSchema()
users_schema = UserSchema(many=True)

# 路由处理函数：获取所有用户数据
@app.route('/users', methods=['GET'])
def get_users():
    return jsonify(users_schema.dump(users_data))

# 路由处理函数：创建新用户数据
@app.route('/user', methods=['POST'])
def create_user():
    new_user = User(id=request.json['id'], username=request.json['username'], email=request.json['email'])
    users_data.append(new_user)
    return user_schema.jsonify(new_user)

if __name__ == '__main__':
    app.run(debug=True)

```