Question

我正在尝试构建用户，创建位置（我正在使用Google地理编码API）并保存所有内容，但不会在数据库中创建关联。一切都很好。响应正是我想要的，但是当我进入数据库时，不会创建关联。我使其工作的唯一方法是单独创建和保存位置实体，并直接将外键“locationId”设置为新生成的ID。已经差不多一个星期，我仍然无法弄清楚如何让它发挥作用。如果它可以帮助，我也使用PostgreSQL。以下是creation with associations.

的文档

以下是我的协会：

User.belongsTo(models.Location, { as: 'location', foreignKey: 'locationId' });
Location.hasMany(models.User, { as: 'users', foreignKey: 'locationId' });

这是我的控制器代码：

const createRandomToken = crypto
  .randomBytesAsync(16)
  .then(buf => buf.toString('hex'));

const createUser = token => User.build({
  firstName: req.body.firstName,
  lastName: req.body.lastName,
  email: req.body.email,
  passwordResetToken: token,
  passwordResetExpires: moment().add(1, 'days'),
  role: req.body.roleId,
  active: true
}, {
  include: [{ model: Location, as: 'location' }]
});

const createLocation = (user) => {
  if (!user) return;
  if (!req.body.placeId) return user;
  return googleMapsHelper.getLocationByPlaceId(req.body.placeId).then((location) => {
    user.location = location;
    return user;
  });
};

const saveUser = (user) => {
  if (!user) return;
  return user.save()
    .then(user => res.json(user.getPublicInfo()));
};

createRandomToken
  .then(createUser)
  .then(createLocation)
  .then(saveUser)
  .catch(Sequelize.ValidationError, (err) => {
    for (let i = 0; i < err.errors.length; i++) {
      if (err.errors[i].type === 'unique violation') {
        return next(createError.Conflict(err.errors[i]));
      }
    }
  })
  .catch(err => next(createError.InternalServerError(err)));

以下是回复：

{
  "id": 18,
  "firstName": "FirstName",
  "lastName": "LastName",
  "email": "test@test.com",
  "lastLogin": null,
  "passwordResetExpires": "2018-04-15T21:02:34.624Z",
  "location": {
    "id": 5,
    "placeId": "ChIJs0-pQ_FzhlQRi_OBm-qWkbs",
    "streetNumber": null,
    "route": null,
    "city": "Vancouver",
    "postalCode": null,
    "country": "Canada",
    "region": "British Columbia",
    "formatted": "Vancouver, BC, Canada",
    "createdAt": "2018-04-14T20:57:54.196Z",
    "updatedAt": "2018-04-14T20:57:54.196Z"
}

Answer 1

在使用sequelize Github来回一对之后，我实现了使用事务，设置器和修改我的承诺逻辑来做同样的事情。

const createLocation = new Promise((resolve, reject) => {
  if (!req.body.placeId) return resolve();
  googleMapsHelper
    .getLocationByPlaceId(req.body.placeId)
    .then(location => resolve(location))
    .catch(() => reject(createError.BadRequest('PlaceId invalide')));
});

const createUser = () => sequelize.transaction((t) => {
  const user = User.build({
    firstName: req.body.firstName,
    lastName: req.body.lastName,
    email: req.body.email,
    passwordResetToken: crypto.randomBytes(16).toString('hex'),
    passwordResetExpires: moment().add(1, 'days'),
    active: true
  });
  return user.save({ transaction: t })
    .then(user => createLocation
      .then(location => user.setLocation(location, { transaction: t })));
});

createUser
  .then(user => res.json(user))
  .catch(err => httpErrorHandler(err, next));

使用关联构建和保存

1 个答案: