convert query from mysql client to sequelize syntax - mysql

Question

i working sequelize with nodejs , i try convert my query codes from mysql query to sequelize syntax can you help me on this ?
mysql query :
select username,message,fromUserId,toUserID from messages inner join messageToUsers on messages.id = messageToUsers.messageID left outer join users on messages.fromUserID = users.id where messageToUsers.`toUserID` = 5 and messages.`fromUserId` = 7 or messageToUsers.`toUserID` = 7 and messages.`fromUserId` = 5
sequlize query
Message.hasMany(MessageToUser,{foreignKey:'messageID'});
Message.belongsTo(Users,{foreignKey:'fromUserId'});
Message.findAll({where:{fromUserId :5,fromUserID : 7},
include :[
{model:MessageToUser,where:{toUserID:5,toUserID:7}} ,
{model:Users,attributes:['id','username']}
]
}).then(function(messages) {
console.log(JSON.stringify(messages));
res.status(200).json(messages);
})

Answer 1

You are missing your attributes
Message.hasMany(MessageToUser,{foreignKey:'messageID'});
Message.belongsTo(Users,{foreignKey:'fromUserId'});
Message.findAll({where:{fromUserId :5,fromUserID : 7},
include :[
{model:MessageToUser,where:{toUserID:5,toUserID:7}} ,
{model:Users,attributes:['id','username']}
],
attributes: ["username","message", "toUserId", "fromUserId"] //<-HERE
}).then(function(messages) {
console.log(JSON.stringify(messages));
res.status(200).json(messages);
}); //<- you also missed a semicolon here.
Second thing I noticed. If you use the same field two times in the same Model in your where, one of them will be ignored. You need to use $and.
{model:MessageToUser,where:{
$and: {[toUserID:5],
[toUserID:7]}
}}
Note: missing semicolons at the end of a statement usually won't cause your application to fail but is best practice to be consistent, either always use them or always omit them.

Answer 2

i fixed this problem thanks everybody
Message.hasMany(MessageToUser,{foreignKey:'messageID',as: 'model1'});
Message.belongsTo(Users,{foreignKey:'fromUserId'});
Message.findAll({where:{$or:[{'$model1.toUserId$':toUserId,fromUserId:fromUserID},{'$model1.toUserId$':fromUserID,fromUserId:toUserId}]},
include :[
{attributes: ["toUserId"],model:MessageToUser,as: 'model1'} ,
{attributes: ["username"],model:Users}
]
}).then(function(messages) {
console.log(JSON.stringify(messages));
res.status(200).json(messages);
});