Question

以下链接说我们可以使用字段别名，如id，price：crazy_price_field等。我正在尝试使用它，但这不起作用。 http://wiki.apache.org/solr/CommonQueryParameters#Field_alias https://issues.apache.org/jira/browse/SOLR-1205

我的查询：

http://localhost:8080/solr/ee_core/select?indent=on&version=2.2&q=\*%3A\*&fq=%2BinstanceId_index_store%3A217&start=0&rows=10&fl=description_index_store%2Cscore&qt=&wt=json

fl = description_index_store，得分根据字段名称 description_index_store 和得分

提供正确的结果

{
    "responseHeader": {
        "status": 0,"QTime": 1,
        "params": {
            "explainOther": "","fl": "description_index_store,score",
            "indent": "on","start": "0","q": "*:*","hl.fl": "","qt": "",
            "wt": "json","fq": "+instanceId_index_store:217","rows": "3",
            "version": "2.2"
        }
    },
    "response": {
        "numFound": 128,"start": 0,"maxScore": 1,
        "docs": [
            {
                "description_index_store": "Apple MacBook - Intel Core 2 Duo",
                "score": 1
            },
            {
                "description_index_store": "Apple MacBook - Intel Core 2 Duo",
                "score": 1
            },
            {
                "description_index_store": "HP Envy - 17.3\" - Intel Core i7",
                "score": 1
            }
        ]
    }
}

但是当我尝试在同一个查询中使用别名，如 fl = description：description_index_store，得分时，它不会返回该字段。

{
    "responseHeader": {
        "status": 0,"QTime": 0,
        "params": {
            "explainOther": "","fl": "description:description_index_store,score",
            "indent": "on","start": "0","q": "*:*","hl.fl": "","qt": "",
            "wt": "json","fq": "+instanceId_index_store:217","rows": "3",
            "version": "2.2"
        }
    },
    "response": {
        "numFound": 128,"start": 0,"maxScore": 1,
        "docs": [
            {
                "score": 1
            },
            {
                "score": 1
            },
            {
                "score": 1
            }
        ]
    }
}

Answer 1

您指的是已添加到Solr 4.0版本但尚未发布的功能。实际上，在该维基页面的fl section内有一个感叹号，它告诉您以下内容（仍在fl部分内）仅适用于Solr 4.0。

SOLR-1205 issue已在SOLR-2444: Update fl syntax to support: pseudo fields, AS, transformers, and wildcards内解决，Solr 4.0 roadmap已与Solr 4.0一起发布。您可能需要查看{{3}}以了解何时应该发布它。

Solr Search中的Solr Field Alias不起作用

1 个答案: