Sequelize Multi Inserting Data - node.js

Question

Hi everybody =) It's my first time using sequelize with postgresql, and I have problem with multi inserting data with sequelize(node.js). We have some tables(see in pic)
Table Relations
1) Clients -> 1:M -> Contracts
2) Contracts -> 1:M -> Contracts_attaches
3) Rates -> 1:M -> Contracts_attaches
Clients Model
const Client = db.define('clients', {
id_clients: {
type: Sequelize.INTEGER,
allowNull: false,
autoIncrement: true,
primaryKey: true,
},
nclients: {
type: Sequelize.STRING
}
-some fields-
createdAt: {
allowNull: false,
type: Sequelize.DATE
},
updatedAt: {
allowNull: false,
type: Sequelize.DATE
}
});
Rate Model
const Rate = db.define('rates', {
id_rates: {
type: Sequelize.INTEGER,
allowNull: false,
autoIncrement: true,
primaryKey: true
}
--fields--
createdAt: {
allowNull: false,
type: Sequelize.DATE
},
updatedAt: {
allowNull: false,
type: Sequelize.DATE
}
})
Contract Model
const Contract = db.define('contracts', {
id_contracts: {
type: Sequelize.INTEGER,
allowNull: false,
autoIncrement: true,
primaryKey: true
},
--fields--
id_clients: {
type: Sequelize.INTEGER,
allowNull: false
},
createdAt: {
allowNull: false,
type: Sequelize.DATE
},
updatedAt: {
allowNull: false,
type: Sequelize.DATE
}
})
Contract_attach Model
const Contract_attach = db.define('contract_attach', {
id: {
type: Sequelize.INTEGER,
allowNull: false,
autoIncrement: true,
primaryKey: true
},
contracts_id: {
type: Sequelize.INTEGER,
references:{
model:'contracts',
key:'id_contracts'
}
},
rate_id: {
type: Sequelize.INTEGER
},
createdAt: {
allowNull: false,
type: Sequelize.DATE
},
updatedAt: {
allowNull: false,
type: Sequelize.DATE
},
})
Association config
Contract.belongsTo(Contract_attach, { foreignKey:'id_contracts', sourceKey:'contracts_id' });
Contract_attach.hasMany(Contract,{foreignKey:'id_contracts', sourceKey:'contracts_id'});
Contract_attach.hasMany(Rate,{foreignKey: 'id_rates', sourceKey: 'rate_id'});
Rate.belongsTo(Contract_attach, { foreignKey: 'rate_id', sourceKey: 'id_rates' });
Example Inserting Data
I try insert data like this code
Contract.create({'numcontract':22,'datereg':'2019-12-11','id_clients':5,Contract_attach:[{'rate_id':2,'rate_id':3}]},
{include: [Contract_attach]}).then(result => console.log(result));
or this code
Contract.create({'numcontract':22,'datereg':'2019-12-11','id_clients':5,Contract_attach:[{'ratename':'Small Buissness','ratename':'Small Buissness 10'}]},
{include: [Contract_attach]}).then(result => console.log(result));
When I try insert data with this code, sequelize inserting data just for Contract table, and ignoring insert to Contract_attach.
PS. Rate table have data, and we don't need insert data to the Rate table.

Answer 1

For some, it may and will be useful, but I solved this problem like this
Contr.create({'numcontract':22,'datereg':'2019-12-11','id_clients':5})
.then(function(contr){
contract_att.bulkCreate([{'contracts_id':contr.id_contracts, 'rate_id':2},{'contracts_id':contr.id_contracts,'rate_id':3}]);
});
If you have another solution, pls share ))

Answer 2

There are several issues here
you said Contract > 1:M > Contract_attach then you write Contract_attach.hasMany(Contract...etc. it should be the other way around Contract.hasMany(Contract_attach...etc same goes for rates
In diagram there is relation between Contract_attach and rates but the define you didn't define this reference
Its not clear that columns rate_id and contract_id are nullable or not. based on that we can define if Contract_attach can or can not be belong to 2 different tables.
I think that the database schema need to change or explain why its in this way