[英]TypeError: object is not a function when defining models in NodeJs using Sequelize
這是我的managedb.js
var Sequelize = require('sequelize-postgres').sequelize;
var postgres = require('sequelize-postgres').postgres;
var pg = require('pg');
var db = new Sequelize('tesf3', 'postgres', 'postgres', {
dialect: 'postgres',
port: '5432',
omitNull: true
});
module.exports.db = db;
var Link = db.import(__dirname + '/lib/link/models').Link;
var LinkUser = db.import(__dirname + '/lib/link/models').LinkUser;
module.exports.Link = Link;
module.exports.LinkUser = LinkUser;
這是我在庫中的models.js:
var sequelize = require('../../managedb').db;
var DataTypes = require('sequelize-postgres').sequelize;
var Link = sequelize.define('Link', {
url: {
type: DataTypes.STRING,
validate:{
isUrl: true,
notEmpty: true,
notNull: true
}
},
context: {
type: DataTypes.STRING,
defaultValue: " "
},
previewImage: {
type: DataTypes.STRING
},
source:{
type: DataTypes.STRING
},
shortUrl:{
type: DataTypes.STRING
},
viewed:{
type: DataTypes.STRING
},
image:{
type: DataTypes.STRING
},
id: {
type: DataTypes.INTEGER,
primaryKey: true,
autoIncrement: true
}
},
{
instanceMethods: {
countTasks: function() {
// how to implement this method ?
}
}
});
var LinkUser = sequelize.define('LinkUser', {
linkId: {
type: DataTypes.INTEGER
},
userId: {
type: DataTypes.INTEGER
},
id: {
type: DataTypes.INTEGER,
primaryKey: true,
autoIncrement: true
}
},
{
instanceMethods: {
countTasks: function() {
// how to implement this method ?
}
}
});
module.exports.Link = Link;
module.exports.LinkUser = LinkUser;
我哪里錯了? 我不能在單個js文件中定義多個模型嗎?
Sequelize.import期望從模型文件返回一個函數 。 我將每個模型都放在一個單獨的文件中。 例如,link.js可能是這樣的:
module.exports = function(sequelize, DataTypes) {
return sequelize.define('Link', {
url: {
type: DataTypes.STRING,
validate:{
isUrl: true,
notEmpty: true,
notNull: true
}
},
context: {
type: DataTypes.STRING,
defaultValue: " "
},
...
});
}
然后在您的managedb.js
文件中,您可以遍歷文件:
// load models
var models = [
'Link',
'LinkUser'
];
models.forEach(function(model) {
module.exports[model] = sequelize.import(__dirname + '/' + model);
});
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