Flask-restplus:如何使用嵌套的字符串列表来记录flask restplus的请求和响应?

问题描述 投票:0回答:1

我正在尝试使用Flask-restplus'api.model记录我的请求正文,并且我必须以特定的结构提供数据。这是请求正文,如下所示:

请求正文

{
  "version": 0,
  "subject": "SUBJECT10",
  "organization": "company",
  "time": "2010-02-10T09:30:00Z",
  "features": {
    "age": 18,
    "gender": "M",
    "hear_rate": {
      "value": 120,
      "time": "2010-02-10T09:30:00Z"
    },
    "blood pressure": {
      "value": 72,
      "time": "2012-02-10T09:30:00Z"
    },
    "wbc": {
      "value": 10,
      "time": "2010-02-10T09:30:00Z"
    }
  }
}

我的尝试

为了将我的请求主体建模为Flask-Restplus'api.model,我提出了以下引发属性错误的解决方案。

from flask_restplus import fields
from flask import Flask, jsonify
from flask_restplus import Api, Resource, fields, reqparse, inputs

app = Flask(__name__)
api = Api(app)
ns = api.namespace('test api')

features_attr = api.model('biomarker features', {
    # 'name': fields.String(required=True),
    'value': fields.Integer(required=True),
    'time': fields.Date(required=True)
})

class biom_feats_objs(fields.Nested):
    __schema_type__ = ['string', 'object']

    def output(self, key, obj):
        if key =='value':
            return obj
        else:
            return 'default value'
        return super().output(key, obj)

    def schema(self):
        schema_dict = super().schema()
        schema_dict.pop('type')
        nested_ref = schema_dict.pop('$ref')
        schema_dict['oneof'] = [
        {'type': 'string'},
        {'$ref': nested_ref}
        ]
        return schema_dict

feat_root_objs = api.model('biom_feats_root_objs', {
    'age': fields.String(required=True),
    'gender': fields.String(required=True),
    'time': fields.Date(required=True),
    'features': fields.List(fields.biom_feats_objs(features_attr))
    })

@ns.route('/immunomatch_Ed_features')
class immunomatch_Ed_features(Resource):
    @ns.expect(feat_root_objs)
    def post(self):
        parser = reqparse.RequestParser()
        parser.add_argument('age', type=str, required=True),
        parser.add_argument('gender', type=str, required=True),
        parser.add_argument('features', type=str, required=True),
        parser.add_argument('time', type=inputs.datetime_from_iso8601, required=True)

        try:
            args = parser.parse_args()
            return jsonify(args)
        except:
            return None, 400

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

错误消息

这是我从上面的代码中得到的错误消息。

Traceback (most recent call last):
  File ".\immunomatch_Ed_features.py", line 41, in <module>
    'features': fields.List(fields.biom_feats_objs(features_attr))
AttributeError: module 'flask_restplus.fields' has no attribute 'biom_feats_objs'

但是上面的代码给了我属性错误,我不知道为什么上面的代码无法编译。我该如何工作?如何为以上请求正文和响应正文设置正确的api.model?有什么办法解决这个问题吗?谢谢

python flask flask-restful flask-restplus
1个回答
0
投票

您的代码中缺少一些内容:

1)从Namespace导入flask_restfulplus对象>

2)使用Namespace对象创建名称空间

3)使用API​​注册名称空间

请参阅修改后的代码段:

from flask_restplus import fields
from flask import Flask, jsonify
from flask_restplus import Api, Namespace, Resource, fields, reqparse, inputs
# 1) import `Namespace` above


app = Flask(__name__)
api = Api(app)
ns = Namespace('test api')       # 2) create the namespace 'test api'

features_attr = api.model('biomarker features', {
    # 'name': fields.String(required=True),
    'value': fields.Integer(required=True),
    'time': fields.Date(required=True)
})

class biom_feats_objs(fields.Nested):
    __schema_type__ = ['string', 'object']

    def output(self, key, obj):
        if key =='value':
            return obj
        else:
            return 'default value'
        return super().output(key, obj)

    def schema(self):
        schema_dict = super().schema()
        schema_dict.pop('type')
        nested_ref = schema_dict.pop('$ref')
        schema_dict['oneof'] = [
        {'type': 'string'},
        {'$ref': nested_ref}
        ]
        return schema_dict

feat_root_objs = api.model('biom_feats_root_objs', {
    'age': fields.String(required=True),
    'gender': fields.String(required=True),
    'time': fields.Date(required=True),
    'features': fields.List(fields.Nested(features_attr))
    })

@ns.route('/immunomatch_Ed_features')
class immunomatch_Ed_features(Resource):
    @ns.expect(feat_root_objs)
    def post(self):
        parser = reqparse.RequestParser()
        parser.add_argument('age', type=str, required=True),
        parser.add_argument('gender', type=str, required=True),
        parser.add_argument('features', type=str, required=True),
        parser.add_argument('time', type=inputs.datetime_from_iso8601, required=True)

        try:
            args = parser.parse_args()
            return jsonify(args)
        except:
            return None, 400

if __name__ == '__main__':
    api.add_namespace(ns)      # 3) register your namespace with your api
    app.run(debug=True)

请参阅docs,了解如何使用多个名称空间以及如何创建和注册它们。

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