Python 和 Flask 如何返回列表？ [复制]

Question

我正在尝试在烧瓶中返回此列表。 Teacher 是一个类并返回对象。

@app.route('/v1/teachers', methods=['GET'])
def getTeachers():
  teachers = []
  for teacher in Teacher.objects:
    teachers.append(teacher)
  return teachers

此代码返回的典型错误是 TypeError: 'list' object is not callable The view function did not return a valid response.

我快疯了，我不知道发生了什么。有人知道吗？

谢谢！！

编辑：

我已经解决了。问题不在于如何返回列表，问题在于对象的 JSON 序列化。

@app.route('/v1/teachers', methods=['GET'])
def getTeachers():
  teachers = []
  for teacher in Teacher.objects:
     teacherJson = teacher.to_json()
     teacherData = json.loads(teacherJson)
     teachers.append(teacherData)
  return jsonify({'teachers': teachers})

感谢您的帮助。

Answer 1

您不能直接从烧瓶视图返回列表。请尝试 jsonify

from flask import jsonify
@app.route('/v1/teachers', methods=['GET'])
def getTeachers():
   teachers = []
   for teacher in Teacher.objects:
      teachers.append(teacher)
   return jsonify(teachers)

Answer 2

你正在返回一个列表，Flask 期望返回一个响应。

from flask import jsonify

@app.route('/v1/teachers', methods=['GET'])
def getTeachers():
  teachers = []
  for teacher in Teacher.objects:
    teachers.append(teacher)
  return jsonify({teachers: [teachers]})