Sequelizejs is not associated to - node.js

Question

I made some associate but it did not work, probably with me that something is wrong, ask for help.
There are two models
module.exports = function (sequelize, DataTypes) {
var pages_lang = require('./pages_lang')(sequelize, DataTypes);
return sequelize.define('pages', {
id: {
type: DataTypes.INTEGER(10),
allowNull: false,
primaryKey: true,
autoIncrement: true,
references : { model: "pages_lang", key: "page_id" }
},
name: {
type: DataTypes.STRING,
allowNull: false
},
published: {
type: DataTypes.BOOLEAN,
allowNull: false,
defaultValue: '0'
},
createdAt: {
type: DataTypes.DATE,
allowNull: false,
defaultValue: '0000-00-00 00:00:00'
},
updatedAt: {
type: DataTypes.DATE,
allowNull: false,
defaultValue: '0000-00-00 00:00:00'
}
}, {
classMethods: {
associate: function (models) {
this.hasMany(models.pages_lang, {onDelete: 'SET NULL', onUpdate: 'CASCADE', foreignKey: 'page_id', as: 'pages', through: models.pages_lang});
},
getAll() {
return this.findAll({include: [{model: pages_lang, as: 'pages_lang'}]}).then(function (result) {
return result;
});
}
}
});
};
module.exports = function (sequelize, DataTypes) {
return sequelize.define('pages_lang', {
id: {
type: DataTypes.INTEGER(10),
allowNull: false,
primaryKey: true,
autoIncrement: true
},
page_id: {
type: DataTypes.INTEGER(10),
allowNull: false,
references : { model: "pages", key: "id" }
},
content: {
type: DataTypes.TEXT,
allowNull: false
}
}, {
classMethods: {
associate: function (models) {
this.belongsTo(models.pages, {foreignKey: 'id', foreignKeyConstraint:true, as: 'pages', through: models.pages});
}
}
});
};
But when you call results in an error
Unhandled rejection Error: pages_lang (pages_lang) is not associated
to pages!
Advance very grateful for the help

Answer 1

Your association alias (as) should match what you pass to findAll
this.hasMany(models.pages_lang, {onDelete: 'SET NULL', onUpdate: 'CASCADE', foreignKey: 'page_id', as: 'pages_lang' });
return this.findAll({include: [{model: pages_lang, as: 'pages_lang'}]});
Since the model is already called pages_lang, you can also skip the alias completely:
this.hasMany(models.pages_lang, {onDelete: 'SET NULL', onUpdate: 'CASCADE', foreignKey: 'page_id'});
return this.findAll({include: [pages_lang]});
Notice that I removed the through argument - it should only be used for belongsToMany (many-to-many)