当尝试关联条目时，将多个到多个故障序列化为“不相关联”？
我与Sequelize多对多的configuration有一个问题，它在那里抱怨site_article_keyword is not associated to article_keyword 。 下面的代码代表了一个最小的testing案例，试图了解我做错了什么（我希望提供更小的东西，但这是我的）。 我正在使用蓝鸟的Promise API。
const Sequelize = require('sequelize'); var sequelize = new Sequelize(undefined, undefined, undefined, { dialect: 'sqlite', storage: './mydatabase', }); const SiteArticle = sequelize.define('site_article', { id: { type: Sequelize.INTEGER, primaryKey: true, autoIncrement: true }, ownerId: { type: Sequelize.INTEGER, field: 'owner_id' }, title: Sequelize.STRING // other fields omitted }, { timestamps: true }); const ArticleKeyword = sequelize.define('article_keyword', { id: { type: Sequelize.INTEGER, primaryKey: true, autoIncrement: true }, name: Sequelize.STRING, language: Sequelize.STRING // other fields omitted }, { timestamps: true }); const SiteArticleKeyword = sequelize.define('site_article_keyword', { siteArticleId: { type: Sequelize.INTEGER, field: 'site_article_id', references: { model: SiteArticle, key: 'id' } }, articleKeywordId: { type: Sequelize.INTEGER, field: 'article_keyword_id', references: { model: ArticleKeyword, key: 'id' } } // other fields omitted }, { timestamps: true }); (ArticleKeyword).belongsToMany( SiteArticle, { through: SiteArticleKeyword }); (SiteArticle).belongsToMany( ArticleKeyword, { through: SiteArticleKeyword });
这是现在定义的模型，现在试图创build源和目的地条目，然后我想要关联。 在我称为ArticleKeyword.findAll()的行上发生故障：
sequelize.sync({}).then(function() { // populate some data here let siteArticle; SiteArticle.create({ ownerId: 1, title: 'hello world' }).then(function(entry) { siteArticle = entry; console.log('site article: ', JSON.stringify(entry, undefined, 2)); return ArticleKeyword.findOrCreate({ where: { name: 'keyword1', language: 'en' } }); }).spread(function(entry, success) { console.log('article keyword: ', JSON.stringify(entry, undefined, 2)); return siteArticle.addArticle_keyword(entry); }).spread(function(entry, success) { console.log('site article keyword: ', JSON.stringify(entry, undefined, 2)); const siteArticleId = 1; const language = 'en'; return ArticleKeyword.findAll({ where: { language: language, }, include: [{ model: SiteArticleKeyword, where: { siteArticleId: siteArticleId } }] }); }).then(function(articleKeywords) { if (articleKeywords) { console.log('entries: ', JSON.stringify(articleKeywords, undefined, 2)); } else { console.log('entries: ', 'none'); } }).catch(function(error) { console.log('ERROR: ', error); }.bind(this)); }).catch(function(error) { console.log(error); });
我将代码放在Sequelize文档中的“ Mixin BelongsToMany”示例上。
任何人都可以build议我做错了什么？
问题结果是site_article_keyword不相关的原因是因为它是关联！ 考虑到这一点，代码变成：
return ArticleKeyword.findAll({ where: { language: language, }, include: [{ model: SiteArticle, as: 'SiteArticle', siteArticleId: siteArticleId }] });
顺便说一句，对我的代码进行小小的调整，就是将“as”包含在belongsToMany中：
(ArticleKeyword).belongsToMany( SiteArticle, { through: SiteArticleKeyword, as: 'SiteArticle' }); (SiteArticle).belongsToMany( ArticleKeyword, { through: SiteArticleKeyword, as: 'ArticleKeyword' });
这允许addArticleKeyword()而不是addArticle_Keyword() 。
通过关系，以下应该工作
ArticleKeyword.findAll({ include: [{ model: SiteArticle, through: { attributes: ['createdAt', 'startedAt', 'finishedAt'], where: {siteArticleId: siteArticleId } }] });