Removes a Query Field (qf parameter)

# SolrDisMaxQuery::removeQueryField

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SolrDisMaxQuery::removeQueryField — Removes a Query Field (qf parameter)

### 说明

public function SolrDisMaxQuery::removeQueryField(string `$field`): SolrDisMaxQuery

Removes a Query Field (qf parameter) from the field list added by SolrDisMaxQuery::addQueryField()

qf: When building DisjunctionMaxQueries from the user's query it specifies the fields to search in, and boosts for those fields.

### 参数

`field`

  Field Name

### 返回值

SolrDisMaxQuery

### 示例

示例 #1 SolrDisMaxQuery::removeQueryField() example

    <?php

    $dismaxQuery = new SolrDisMaxQuery('lucene');
    $dismaxQuery
        ->addQueryField('first', 3)
        ->addQueryField('second', 0.2)
        ->addQueryField('cat');
    echo $dismaxQuery . PHP_EOL;
    // remove field 'second'
    echo $dismaxQuery->removeQueryField('second');
    ?>

以上示例的输出类似于：

    q=lucene&defType=edismax&qf=first^3 second^0.2 cat
    q=lucene&defType=edismax&qf=first^3 cat

### 参见

- SolrDisMaxQuery::addQueryField() - Add a query field with optional boost (qf parameter)

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