Sails.js 模型关联问题

Question

我一直在 Whosebug 上查看大量教程和问题，但仍然卡住了。

在 Sails.js 中，我试图将两个已经在 MySQL 数据库中包含数据的模型连接在一起，但我无法让 Sails 通过关联输出数据。我可以让 Sails 独立输出每个模型，但是当我尝试连接它们时，我只会遇到错误。我正在努力正确关联关联和输出。

我正在尝试输出所有评论并加入学校信息以输出到视图中的table。

我的模型是： api/models/Schools.js

module.exports = {
  connection: 'mysql',
  tableName: 'schools',
  autoCreatedAt: false,
  autoUpdatedAt: false,
  attributes: {
    SID: {
      type: 'integer',
      autoIncrement: true,
      primaryKey: true,
      size: 15
    },
    schoolName: {
      type: 'text',
    },
    schoolCity: {
      type: 'text',
    },
    schoolCountry: {
      type: 'text',
    },
    schoolRegion: {
      type: 'text',
    },
    schoolWebsite: {
      type: 'text',
    },
    schoolCountryCode: {
      type: 'text',
    },
    schoolNumbStudents: {
      type: 'integer',
    },
    schoolNumbFaculty: {
      type: 'integer',
      size: 4,
      defaultsTo: '0'
    },
    schoolCurriculum: {
      type: 'text',
    },
    schoolLanguage: {
      type: 'text',
    },
    schoolLangInstruction: {
      type: 'text',
    },
    schoolonetoone: {
      type: 'text',
    },
    schoolAccred: {
      type: 'text',
    },
    schoolRatio: {
      type: 'string',
      size: 3
    },
    schoolMission: {
      type: 'text',
    },
    schoolFiveWords: {
      type: 'text',
    },
    schoolInitiatives: {
      type: 'text',
    },
    schoolSalaryMin: {
      type: 'text',
    },
    schoolSalaryMax: {
      type: 'text',
    },
    schoolSalaryBA: {
      type: 'text',
    },
    schoolSalaryBAPlus: {
      type: 'text',
    },
    schoolSalaryMA: {
      type: 'text',
    },
    schoolSalaryMAPlus: {
      type: 'text',
    },
    schoolHealth: {
      type: 'text',
    },
    schoolAirfare: {
      type: 'text',
    },
    schoolAirfareProv: {
      type: 'text',
    },
    schoolHousing: {
      type: 'text',
    },
    schoolDependent: {
      type: 'text',
    },
    schoolShipping: {
      type: 'text',
    },
    schoolRetirement: {
      type: 'text',
    },
    reviews: {
      collection: 'review',
      via: 'theschool'
    }
  }
};

api/models/Reviews.js

module.exports = {
  connection: 'mysql',
  tableName: 'reviews',
  autoCreatedAt: false,
  autoUpdatedAt: false,
  attributes: {
    RID: {
      type: 'integer',
      required: true,
      autoIncrement: true,
      primaryKey: true,
      size: 15
    },
    schoolID: {
      type: 'integer',
      required: true,
      size: 15
    },
    profileID: {
      type: 'integer',
      required: true,
      size: 15
    },
    active: {
      type: 'integer',
      required: true,
      size: 1
    },
    dateCreated: {
      type: 'date',
      required: true,
      defaultsTo: 'CURRENT_TIMESTAMP'
    },
    Q1: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q2: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q3: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q4: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q5: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q6: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q7: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q8: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q9: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q10: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q11: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q12: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q13: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q14: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q15: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q16: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q17: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q18: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q19: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q20: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q21: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q22: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q23: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q24: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q25: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q26: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q27: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q28: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q29: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q30: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q31: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q32: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q33: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q34: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q35: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q36: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q37: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q38: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q39: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q40: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q41: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q42: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q43: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q44: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q45: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q46: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q47: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q48: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q49: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q50: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q51: {
      type: 'integer',
      required: true,
      size: 2
    },
    Q52: {
      type: 'integer',
      required: true,
      size: 2
    },
    freeReview: {
      type: 'text',
      required: true
    },
    theschool: {
      model: 'schools',
      via: 'reviews'
    }
  }
};

我的控制器代码是。

module.exports = {
  reviews: function(req, res){
    Schools.find().populate('reviews').exec(function afterFind(err, review) {
      if (err) return res.serverError(err);
      console.log(review);
      return res.view({thereviews: review});
    });
  },

};

感谢您的帮助！

Answer 1

我自己想出来了。对于任何被卡住的人...

在Schools.js我修改了模型属性

reviews: {
      collection: 'review',
      via: 'theschool'
    }

到

 reviews: {
        collection: 'reviews',
        via: 'schoolID',
        dominant: true
    }

其中 via 引用 Reviews.js 模型中的 schoolID

在Reviews.js我修改了模型。我删除了属性，

theschool: {
      model: 'schools',
      via: 'reviews'
}

并将 schoolID 属性更新为

schoolID: {
      type: 'integer',
      required: true,
      size: 15,
      model:'schools'
    },

那么对于我有的控制器。

reviews: function(req, res){
    Schools.findOne(1)
      .populateAll()
      .exec(function afterFind(err, theresults) {
        if (err) return res.serverError(err);
        return res.view(theresults);
    });
  },

它并没有完全按照我想要的方式输出数据，但它至少将两个 tables/models 连接在一起。我还认为诀窍在于 via 需要是数据库中的 table 字段。

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sails.js