Friday 2 June 2017

Get specific user in a 1 to many relationship

I have two models in my database: User and Foto

A user can take many fotos, and a foto is related to 1 specific user, so i have a 1 to many relationship.

What i try to archive is, get all fotos and the specific user(not just the key as my model already has, but the entire object)

I tried to do that with eager loading, but i didn't faund a solution yet to do that inside my Foto model, so maybe there is a way to do that with 2 queries on inside other.

Here is my User model

"use strict";
var sequelize = require('./index');
var bcrypt = require('bcrypt-nodejs');
var Foto = require('./Foto');

module.exports = function (sequelize, DataTypes) {
  var User = sequelize.define("User", {
    username: {
      type: DataTypes.STRING,
      allowNull: false,
      unique: true,
      validate: {
        isUnique: function (value, next) {
          var self = this;
          User.find({ where: { username: value } })
            .then(function (user) {
              // reject if a different user wants to use the same username
              if (user && self.id !== user.id) {
                return next('username already in use!');
              }
              return next();
            })
            .catch(function (err) {
              return next(err);
            });
        }
      }
    },

    email: {
      type: DataTypes.STRING,
      allowNull: false,
      unique: true,
      validate: {
        isUnique: function (value, next) {
          var self = this;
          User.find({ where: { email: value } })
            .then(function (user) {
              // reject if a different user wants to use the same email
              if (user && self.id !== user.id) {
                return next('Email already in use!');
              }
              return next();
            })
            .catch(function (err) {
              return next(err);
            });
        }
      }
    },

    typeOfUser: {
      type: DataTypes.INTEGER,
      allowNull:false,
      defaultValue:2
    },

    country: {
      type: DataTypes.STRING,
      allowNull:true,
      defaultValue:null
    },

    birthDate:{
      type: DataTypes.DATEONLY,
      allowNull:true,
      defaultValue:null
    },

    reports: {
      type: DataTypes.INTEGER,
      defaultValue: 0
    },

    points: {
      type: DataTypes.INTEGER,
      defaultValue: 0
    },

    password: {
      type: DataTypes.STRING,
      allowNull:false
    },

    numberFotos: {
      type: DataTypes.INTEGER,
      defaultValue: 0
    }
  }, {
      classMethods: {
        generateHash: function (password) {
          return bcrypt.hashSync(password, bcrypt.genSaltSync(8), null);
        },
        associate: function(models){
          User.hasMany(models.Foto,{foreignKey: "userId", as: "Foto"});
        }

      },
      instanceMethods: {
        validPassword: function (password) {
          return bcrypt.compareSync(password, this.password);
        }
      }

    });

  return User;
}

my Foto model

"use strict";
var sequelize = require('./index');
var bcrypt = require('bcrypt-nodejs');
var User = require('./User');


module.exports = function (sequelize, DataTypes) {
  var Foto = sequelize.define("Foto", {
    reports: {
      type: DataTypes.INTEGER,
      defaultValue: 0
    },
    image: {
      type: DataTypes.STRING,
      allowNull: false
    },
    date: {
      type: DataTypes.DATE,
      allowNull: true
    },
    lat: {
      type: DataTypes.STRING,
      allowNull: true
    },
    lon: {
      type: DataTypes.STRING,
      allowNull: true
    },
    altitude: {
      type: DataTypes.STRING,
      allowNull: true
    },
    userId: {
      type: DataTypes.INTEGER,
      allowNull: false
    },
    plantId: {
      type: DataTypes.INTEGER,
      allowNull: true
    },
  },
    {
      associate: function (models) {
        Foto.belongsTo(models.User, {as:'User'});
      }
    }
  );


  return Foto;
}

as you guys can see i specified the relationship with the include.

So in my route i do this:

 allPictures: function (req, res) {
    Foto.findAll({include: [{model: User, as:'User'}]})
    .then(function (fotos) {
        res.send(fotos);
    })

but i get this result: Unhandled rejection Error: User (User) is not associated to Foto!

This error is really strange, since in the sequelize docs he can obtain it with this:

User.findAll({ include: [ Task ] }).then(users => {
  console.log(JSON.stringify(users))

  /*
    [{
      "name": "John Doe",
      "id": 1,
      "createdAt": "2013-03-20T20:31:45.000Z",
      "updatedAt": "2013-03-20T20:31:45.000Z",
      "tasks": [{
        "name": "A Task",
        "id": 1,
        "createdAt": "2013-03-20T20:31:40.000Z",
        "updatedAt": "2013-03-20T20:31:40.000Z",
        "userId": 1
      }]
    }]
  */
})

am i missing something?

Thanks



via Filipe Costa

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