Yii2 Elasticsearch扩展-如何处理类型映射


Yii2 Elasticsearch extension - how do I handle type mapping?

我希望能够在ES索引中存储json对象。下面是我试图存储的一个示例(这是一个序列化的模型,一个发送到ES的请求体):

"{"id":218,"name":"Test2","category_id":1,"address":"Pushkin street","phone":null,"site":null,"location":{"lat":64,"lon":70},"city":"Heaven","description":"Super company","tags":["#test1","#test2"]}"

当我尝试存储它(当然是通过扩展)时,ES返回的错误是:

"{"error":{"root_cause":[{"type":"mapper_parsing_exception","reason":"failed to parse [location]"}],"type":"mapper_parsing_exception","reason":"failed to parse [location]","caused_by":{"type":"illegal_argument_exception","reason":"unknown property [lat]"}},"status":400}"

如果没有特定的类型映射,我似乎无法做到这一点,比如在文档中:https://www.elastic.co/guide/en/elasticsearch/reference/1.4/mapping-object-type.html

然而,我似乎找不到在模型中提供这种映射的方法。扩展的文档并没有真正说明这一点。所以,我的问题是:我需要它吗?如果需要,怎么需要?

感谢所有反馈。

我假设您的模型是'yii'elasticsearch'ActiveRecord。你需要描述它的属性:

public function attributes()
{
  return [
    'name',
    'category_id',
    'address',
    'phone',
    'site',
    'location',
    'city',
    'description',
    'tags'
  ];
}

不要忘记配置index()type()。在以下示例中,typemy_address

然后,您需要创建一个具有适当字段映射的索引。以下是您的映射应该是什么样子:

"mappings" : {
  "my_address" : {
    "properties" : {
      "name" : { "type" : "string"},
      "category_id" : { "type" : "integer"},
      "address" : { "type" : "string"},
      "phone" : { "type" : "string"},
      "site" : { "type" : "string"},
      "location" : { "type" : "geo_point"},
      "city" : { "type" : "string"},
      "description" : { "type" : "string"},
      "tags" : { "type" : "string"}
    }
  }
}

注意三件事:

  1. 位置类型为geo_point
  2. 标记被声明为string。这也将允许它们成为字符串数组
  3. 我没有包括id字段。如果它是唯一的,我建议您将yii模型的id设置为必要的值($model->primaryKey = '123')。否则,ES模型的内部id将设置为类似AVDXmfJ3Ou7LzqD1DDMj的内容,并且还有一个id字段,这不是很方便

我鼓励您仔细研究映射——在配置如何准确分析字符串时,它们非常重要。

更新:您并没有真正描述模型中任何地方的映射。在迁移中执行此操作,类似于在SQL中创建表。

如果您使用ElasticSearch ActiveRecord,您可以定义一个方法来设置映射

Class BookIndex extends yii'elasticsearch'ActiveRecord
{
    /**
     * sets up the index for this record
     *
     */
    public static function setUpMapping()
    {
        $db = static::getDb();
        //in case you are not using elasticsearch ActiveRecord so current class extends database ActiveRecord yii/db/activeRecord
        // $db = yii'elasticsearch'ActiveRecord::getDb();
        $command = $db->createCommand();
        /*
         * you can delete the current mapping for fresh mapping but this not recommended and can be dangrous.
         */
        // $command->deleteMapping(static::index(), static::type());
        $command->setMapping(static::index(), static::type(), [
            static::type() => [
                // "_id" => ["path" => "id", "store" => "yes"],
                "properties" => [
                    'name'           => ["type" => "string"],
                    'author_name'    => ["type" => "string"],
                    'publisher_name' => ["type" => "string"],
                    'created_at'     => ["type" => "long"],
                    'updated_at'     => ["type" => "long"],
                    'status'         => ["type" => "long"],
                ],
            ],
        ]);
    }
}

稍后,您只需要在想要应用新映射的任何时候调用此方法。