blocks|key|3118469|text|您可以参考这个文档http://docs.sequelizejs.com/en/latest/docs/models-definition/#indexes|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3118470|您将需要更改定义如下所示，并调用同步|3118471|var+Tag+=+sequelize.define('Tag',+{
++++id:+{
++++++++type:+DataTypes.INTEGER(11),
++++++++allowNull:+false,
++++++++primaryKey:+true,
++++++++autoIncrement:+true
++++},
++++user_id:+{
++++++++type:+DataTypes.INTEGER(11),
++++++++allowNull:+false,
++++},
++++count:+{
++++++++type:+DataTypes.INTEGER(11),
++++++++allowNull:+true
++++},
++++name:+{
++++++++type:+DataTypes.STRING,
++++++++allowNull:+true,
++++}
},
{
++++indexes:+[
++++++++{
++++++++++++unique:+true,
++++++++++++fields:+['user_id',+'count',+'name']
++++++++}
++++]
});|code-block|syntax|javascript|3118472|entityMap|0|LINK|mutability|MUTABLE|url|http://docs.sequelizejs.com/en/latest/docs/models-definition/#indexes^0|9|1X|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@$A|T|B|U|1|V]]|C|$]]|$1|D|3|E|5|6|7|W|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|X|8|@]|9|@]|C|$I|J]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|C|$]]]|L|$M|$5|N|O|P|C|$Q|R]]]]

You can refer to this doc <a href="http://docs.sequelizejs.com/en/latest/docs/models-definition/#indexes" rel="noreferrer">http://docs.sequelizejs.com/en/latest/docs/models-definition/#indexes</a>

You will need to change your definition like shown below and call sync 

<pre><code>var Tag = sequelize.define('Tag', {
 id: {
 type: DataTypes.INTEGER(11),
 allowNull: false,
 primaryKey: true,
 autoIncrement: true
 },
 user_id: {
 type: DataTypes.INTEGER(11),
 allowNull: false,
 },
 count: {
 type: DataTypes.INTEGER(11),
 allowNull: true
 },
 name: {
 type: DataTypes.STRING,
 allowNull: true,
 }
},
{
 indexes: [
 {
 unique: true,
 fields: ['user_id', 'count', 'name']
 }
 ]
});
</code></pre>

blocks|key|3118486|text|如果接受的代码不起作用，请尝试下面的代码。在我的情况下，它对我是有效的，而不是被接受的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3118487|var+Tag+=+sequelize.define('Tag',+{
++++id:+{
++++++++type:+DataTypes.INTEGER(11),
++++++++allowNull:+false,
++++++++primaryKey:+true,
++++++++autoIncrement:+true
++++},
++++user_id:+{
++++++++type:+DataTypes.INTEGER(11),
++++++++allowNull:+false,
++++++++unique:+'uniqueTag',
++++},
++++count:+{
++++++++type:+DataTypes.INTEGER(11),
++++++++allowNull:+true,
++++++++unique:+'uniqueTag',
++++},
++++name:+{
++++++++type:+DataTypes.STRING,
++++++++allowNull:+true,
++++++++unique:+'uniqueTag',
++++}
});|code-block|syntax|javascript|3118488|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

If the accepted one is not working then try the below code. It worked for me in my case rather the accepted one.

<pre><code>var Tag = sequelize.define('Tag', {
 id: {
 type: DataTypes.INTEGER(11),
 allowNull: false,
 primaryKey: true,
 autoIncrement: true
 },
 user_id: {
 type: DataTypes.INTEGER(11),
 allowNull: false,
 unique: 'uniqueTag',
 },
 count: {
 type: DataTypes.INTEGER(11),
 allowNull: true,
 unique: 'uniqueTag',
 },
 name: {
 type: DataTypes.STRING,
 allowNull: true,
 unique: 'uniqueTag',
 }
});
</code></pre>

blocks|key|2640928|text|对于将复合唯一约束应用于多列，但Mysql、Sequelize(4.10.2)和NodeJs+8.9.4不起作用，我也有同样的问题。最后，我通过下面的代码修复了这个问题。|type|blockquote|depth|inlineStyleRanges|entityRanges|data|2640929|queryInterface.createTable('actions',+{
++id:+{
++++++type:+Sequelize.INTEGER,
++++++primaryKey:+true,
++++++autoIncrement:+true
++},
++system_id:+{
++++++type:+Sequelize.STRING,
++++++unique:+'actions_unique',
++},
++rule_id:+{
++++++type:+Sequelize.STRING,
++++++unique:+'actions_unique',
++},
++plan_id:+{
++++++type:+Sequelize.INTEGER,
++++++unique:+'actions_unique',
++}
},+{
++uniqueKeys:+{
++++++actions_unique:+{
++++++++++fields:+['system_id',+'rule_id',+'plan_id']
++++++}
++}
});|code-block|syntax|javascript|2640930|unstyled|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|K|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|H|7|L|8|@]|9|@]|A|$]]]|I|$]]

<blockquote>
 I have same issue to applied composite unique constraint to multiple
 columns but nothing work with Mysql, Sequelize(4.10.2) and NodeJs
 8.9.4 finally I fixed through following code.
</blockquote>

<pre><code>queryInterface.createTable('actions', {
 id: {
 type: Sequelize.INTEGER,
 primaryKey: true,
 autoIncrement: true
 },
 system_id: {
 type: Sequelize.STRING,
 unique: 'actions_unique',
 },
 rule_id: {
 type: Sequelize.STRING,
 unique: 'actions_unique',
 },
 plan_id: {
 type: Sequelize.INTEGER,
 unique: 'actions_unique',
 }
}, {
 uniqueKeys: {
 actions_unique: {
 fields: ['system_id', 'rule_id', 'plan_id']
 }
 }
});
</code></pre>

blocks|key|3118523|text|复合独创性续订(手册)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3118524|module.exports+=+{
++up:+(queryInterface,+Sequelize)+=>+{
++++return+queryInterface.createTable('Model',+{
++++++id:+{
++++++++allowNull:+false,
++++++++autoIncrement:+true,
++++++++primaryKey:+true,
++++++++type:+Sequelize.INTEGER
++++++},
++++++fieldOne:+{
++++++++type:+Sequelize.INTEGER,
++++++++unique:+'uniqueTag',
++++++++allowNull:+false,
++++++++references:+{
++++++++++model:+'Model1',
++++++++++key:+'id'
++++++++},
++++++++onUpdate:+'cascade',
++++++++onDelete:+'cascade'
++++++},
++++++fieldsTwo:+{
++++++++type:+Sequelize.INTEGER,
++++++++unique:+'uniqueTag',
++++++++allowNull:+false,
++++++++references:+{
++++++++++model:+'Model2',
++++++++++key:+'id'
++++++++},
++++++++onUpdate:+'cascade',
++++++++onDelete:+'cascade'
++++++},
++++++createdAt:+{
++++++++allowNull:+false,
++++++++type:+Sequelize.DATE
++++++},
++++++updatedAt:+{
++++++++allowNull:+false,
++++++++type:+Sequelize.DATE
++++++}
++++})
++++.then(function()+{
++++++return+queryInterface.sequelize.query(
++++++++'ALTER+TABLE+`UserFriends`+ADD+UNIQUE+`unique_index`(`fieldOne`,+`fieldTwo`)'
++++++);
++++});
++},
++down:+(queryInterface,+Sequelize)+=>+{
++++return+queryInterface.dropTable('Model');
++}
};|code-block|syntax|javascript|3118525|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Sequelize composite unique (manual)

<pre><code>module.exports = {
 up: (queryInterface, Sequelize) =&gt; {
 return queryInterface.createTable('Model', {
 id: {
 allowNull: false,
 autoIncrement: true,
 primaryKey: true,
 type: Sequelize.INTEGER
 },
 fieldOne: {
 type: Sequelize.INTEGER,
 unique: 'uniqueTag',
 allowNull: false,
 references: {
 model: 'Model1',
 key: 'id'
 },
 onUpdate: 'cascade',
 onDelete: 'cascade'
 },
 fieldsTwo: {
 type: Sequelize.INTEGER,
 unique: 'uniqueTag',
 allowNull: false,
 references: {
 model: 'Model2',
 key: 'id'
 },
 onUpdate: 'cascade',
 onDelete: 'cascade'
 },
 createdAt: {
 allowNull: false,
 type: Sequelize.DATE
 },
 updatedAt: {
 allowNull: false,
 type: Sequelize.DATE
 }
 })
 .then(function() {
 return queryInterface.sequelize.query(
 'ALTER TABLE `UserFriends` ADD UNIQUE `unique_index`(`fieldOne`, `fieldTwo`)'
 );
 });
 },
 down: (queryInterface, Sequelize) =&gt; {
 return queryInterface.dropTable('Model');
 }
};
</code></pre>

blocks|key|3118567|text|我试图在一个列上创建一个索引。这对我有用。希望这能有所帮助。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3118568|模型|3118569|module.exports+=+(sequelize,+DataTypes)+=>+{
++const+Tag+=+sequelize.define(
++++"Tag",
++++{
++++++name:+{+type:+DataTypes.STRING,+unique:+true+},
++++++nVideos:+DataTypes.INTEGER
++++},
++++{
++++++indexes:+[
++++++++{
++++++++++unique:+true,
++++++++++fields:+["name"]
++++++++}
++++++]
++++}
++);

++return+Tag;
};|code-block|syntax|javascript|3118570|迁移|3118571|module.exports+=+{
++up:+(queryInterface,+Sequelize)+=>+{
++++return+queryInterface.createTable(
++++++"Tags",
++++++{
++++++++id:+{
++++++++++allowNull:+false,
++++++++++autoIncrement:+true,
++++++++++primaryKey:+true,
++++++++++type:+Sequelize.INTEGER
++++++++},
++++++++name:+{
++++++++++type:+Sequelize.STRING,
++++++++++unique:+"unique_tag"
++++++++},
++++++++nVideos:+{+type:+Sequelize.INTEGER+},
++++++++createdAt:+{
++++++++++allowNull:+false,
++++++++++type:+Sequelize.DATE
++++++++},
++++++++updatedAt:+{
++++++++++allowNull:+false,
++++++++++type:+Sequelize.DATE
++++++++}
++++++},
++++++{
++++++++uniqueKeys:+{
++++++++++unique_tag:+{
++++++++++++customIndex:+true,
++++++++++++fields:+["name"]
++++++++++}
++++++++}
++++++}
++++);
++},
++down:+queryInterface+=>+{
++++return+queryInterface.dropTable("Tags");
++}
};|3118572|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

I tried to create an index on a single column.
This worked for me. Hope this helps.

Model

<pre class="lang-js prettyprint-override"><code>module.exports = (sequelize, DataTypes) =&gt; {
 const Tag = sequelize.define(
 "Tag",
 {
 name: { type: DataTypes.STRING, unique: true },
 nVideos: DataTypes.INTEGER
 },
 {
 indexes: [
 {
 unique: true,
 fields: ["name"]
 }
 ]
 }
 );

 return Tag;
};
</code></pre>

Migration

<pre class="lang-js prettyprint-override"><code>module.exports = {
 up: (queryInterface, Sequelize) =&gt; {
 return queryInterface.createTable(
 "Tags",
 {
 id: {
 allowNull: false,
 autoIncrement: true,
 primaryKey: true,
 type: Sequelize.INTEGER
 },
 name: {
 type: Sequelize.STRING,
 unique: "unique_tag"
 },
 nVideos: { type: Sequelize.INTEGER },
 createdAt: {
 allowNull: false,
 type: Sequelize.DATE
 },
 updatedAt: {
 allowNull: false,
 type: Sequelize.DATE
 }
 },
 {
 uniqueKeys: {
 unique_tag: {
 customIndex: true,
 fields: ["name"]
 }
 }
 }
 );
 },
 down: queryInterface =&gt; {
 return queryInterface.dropTable("Tags");
 }
};

</code></pre>

blocks|key|772387|text|我更喜欢使用复合唯一的后缀同步方法，如果不传递索引名称u，则在添加索引数组中的许多索引时会出现以下错误。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|772388|错误:+SequelizeDatabaseError:标识符名'LONG_NAME‘太长了|blockquote|772389|module.exports+=+function+(sequelize:+any,+DataTypes:+any)+{
return+sequelize.define('muln_user_goals_transaction',+{
++++id:+{
++++++++type:+DataTypes.INTEGER(11),
++++++++allowNull:+false,
++++++++autoIncrement:+true,
++++++++primaryKey:+true,
++++},
++++name:+{
++++++++type:+DataTypes.STRING(),
++++++++allowNull:+false,
++++},
++++email:+{
++++++++type:+DataTypes.STRING(),
++++++++allowNull:+false,
++++},
++++phone:+{
++++++++type:+DataTypes.STRING(),
++++++++allowNull:+false,
++++},
++++amount:+{
++++++++type:+DataTypes.INTEGER(8),
++++++++allowNull:+false
++++},
++++deleted:+{
++++++++type:+DataTypes.BOOLEAN,
++++++++defaultValue:+false,
++++},
},+{
++++tableName:+'muln_user_goals_transaction',
++++timestamps:+false,
++++indexes:+[
++++++++{
++++++++++++name:+'unique_index',
++++++++++++unique:+true,
++++++++++++fields:+['name',+'email',+'phone',+'amount',+'deleted']
++++++++}
++++],
++++defaultScope:+{
++++++++where:+{
++++++++++++deleted:+false
++++++++}
++++}
});
};|code-block|syntax|javascript|772390|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|M|8|@]|9|@]|A|$]]|$1|E|3|F|5|G|7|N|8|@]|9|@]|A|$H|I]]|$1|J|3|-4|5|6|7|O|8|@]|9|@]|A|$]]]|K|$]]

I prefer sequelize sync method with composite unique, If not passing indexes name u will get a error as below on adding many indexes in index array.

<blockquote>
 error: SequelizeDatabaseError: Identifier name 'LONG_NAME' is too long
</blockquote>

<pre><code>module.exports = function (sequelize: any, DataTypes: any) {
return sequelize.define('muln_user_goals_transaction', {
 id: {
 type: DataTypes.INTEGER(11),
 allowNull: false,
 autoIncrement: true,
 primaryKey: true,
 },
 name: {
 type: DataTypes.STRING(),
 allowNull: false,
 },
 email: {
 type: DataTypes.STRING(),
 allowNull: false,
 },
 phone: {
 type: DataTypes.STRING(),
 allowNull: false,
 },
 amount: {
 type: DataTypes.INTEGER(8),
 allowNull: false
 },
 deleted: {
 type: DataTypes.BOOLEAN,
 defaultValue: false,
 },
}, {
 tableName: 'muln_user_goals_transaction',
 timestamps: false,
 indexes: [
 {
 name: 'unique_index',
 unique: true,
 fields: ['name', 'email', 'phone', 'amount', 'deleted']
 }
 ],
 defaultScope: {
 where: {
 deleted: false
 }
 }
});
};
</code></pre>

How do I define a unique index on a combination of columns in sequelize. For example I want to add a unique index on user_id, count and name. 

<pre><code>var Tag = sequelize.define('Tag', {
 id: {
 type: DataTypes.INTEGER(11),
 allowNull: false,
 primaryKey: true,
 autoIncrement: true
 },
 user_id: {
 type: DataTypes.INTEGER(11),
 allowNull: false,
 },
 count: {
 type: DataTypes.INTEGER(11),
 allowNull: true
 },
 name: {
 type: DataTypes.STRING,
 allowNull: true,
 })
</code></pre>

How to define unique index on multiple columns in sequelize

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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如何为后缀中的列组合定义唯一索引。例如，我想在user_id、count和name上添加一个唯一的索引。var Tag = sequelize.define('Tag', {        id: {            type: DataTypes.INTEGER(11),            allowNul...

问如何在后缀中定义多列的唯一索引
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问如何在后缀中定义多列的唯一索引EN