Sequelize simple inner join - node.js

Question

I have two models, policyTable and policy_rule defined as below. There is a column called policy_id in policy_rule which is a foreign key and references to id column in policyTable. The policy_rule can have multiple policyTable, i.e there is a 1:N relationship.
var policyTable = dbController.db.define('policyTable', {
id: {
type: Sequelize.BIGINT,
autoIncrement: true,
primaryKey: true
},
't': {
type: Sequelize.BIGINT,
unique: true
},
'name': {
type: Sequelize.STRING,
},
src: {
type: Sequelize.STRING
}
}, {
timestamps: false,
freezeTableName: true,
tableName: 'zo_policy',
});
var policy_rule = dbController.db.define('policy_rule', {
policy_id: {
type: Sequelize.BIGINT,
references: {
model: policyTable,
key: 'id'
},
onUpdate: 'cascade',
onDelete: 'cascade'
},
agent_id: {
type: Sequelize.BIGINT,
},
enabled: {
type: Sequelize.BOOLEAN,
}
}, {
timestamps: false,
freezeTableName: true,
tableName: 'zo_policy_rule',
});
Now I want to join these two models and get all columns of both of them. How can I do that? I tried the below code but it says
Error: policy_rule is not associated to policyTable!
function getAllPolicies() {
return policyTable.findAndCountAll({
include: [{
model: policy_rule
}]
}).then(function (users) {
console.log(users);
data.count = users.count;
data.users = users.rows;
console.log(data);
return data;
});
};

Answer 1

Even though your associations are defined at the database level, and you indicate this in your column definitions, to use sequelize's include feature, you still need to explicitly define your associations between models, too.
Here's the relevant section in the doco: http://docs.sequelizejs.com/en/latest/docs/associations/#belongsto
and
http://docs.sequelizejs.com/en/latest/docs/associations/#1m
In your case, it'll mean adjusting your code to something along the lines of below - note the new classMethods section in each model definition:
var policyTable = dbController.db.define('policyTable', {
id: {
type: Sequelize.BIGINT,
autoIncrement: true,
primaryKey: true
},
't': {
type: Sequelize.BIGINT,
unique: true
},
'name': {
type: Sequelize.STRING,
},
src: {
type: Sequelize.STRING
}
}, {
timestamps: false,
freezeTableName: true,
tableName: 'zo_policy',
classMethods: {
associate(models) {
this.hasMany(models.policy_rule, {foreignKey: 'policy_id'})
}
}
});
var policy_rule = dbController.db.define('policy_rule', {
policy_id: {
type: Sequelize.BIGINT,
references: {
model: policyTable,
key: 'id'
},
onUpdate: 'cascade',
onDelete: 'cascade'
},
agent_id: {
type: Sequelize.BIGINT,
},
enabled: {
type: Sequelize.BOOLEAN,
}
}, {
timestamps: false,
freezeTableName: true,
tableName: 'zo_policy_rule',
classMethods: {
associate(models) {
this.belongsTo(models.policyTable, {foreignKey: 'policy_id'})
}
}
});