yii2 如何在另一个中创建和设置条件

Question

我想用 yii2 框架添加过滤条件，这个条件必须生成以下请求：

select count(*) from v_ressource
where 
(
    (
        str_to_date('27/04/2016', '%d/%m/%Y')
        between str_to_date(erDateDebut, '%d/%m/%Y')
        and str_to_date(erDateFin, '%d/%m/%Y')
    )
    and erDateFin is not null
)
or
(
    (
        str_to_date('27/04/2016', '%d/%m/%Y') 
        between str_to_date(erDateDebut, '%d/%m/%Y') 
        and now()
    )
    and erDateFin is null
);

如您所见，在 'or' 条件中有 'and' 个条件。

我的模型搜索中有以下代码：

    $query
        ->andFilterWhere([
            'between',
            'str_to_date(\'' . $this->dateRecherche . '\', \'%d/%m/%Y %H:%i\')',
            new Expression('str_to_date(erDateDebut, \'%d/%m/%Y %H:%i\')'),
            new Expression('str_to_date(erDateFin, \'%d/%m/%Y %H:%i\')'),
        ])
        ->andFilterWhere([
            'not', ['erDateFin' => null],
        ]);

    $query
        ->orFilterWhere([
            'between',
            'str_to_date(\'' . $this->dateRecherche . '\', \'%d/%m/%Y %H:%i\')',
            new Expression('str_to_date(erDateDebut, \'%d/%m/%Y %H:%i\')'),
            new Expression('now()'),
        ])
        ->andFilterWhere([
            'is', 'erDateFin', null,
        ]);

both of is null and is not null条件没有出现在生成的请求中并且没有"nested"条件（和or条件中的条件）

感谢您的帮助

Answer 1

andFilterWhere 和 orFilterWhere 不允许以这种方式嵌套，因为它们对查询对象进行操作 - 而不是对条件对象进行操作。您可以这样定义查询：

$query->where(
    ['and',
        [
            'between',
            'str_to_date(\'' . $this->dateRecherche . '\', \'%d/%m/%Y %H:%i\')',
            new Expression('str_to_date(erDateDebut, \'%d/%m/%Y %H:%i\')'),
            new Expression('str_to_date(erDateFin, \'%d/%m/%Y %H:%i\')'),
        ],
        [
            'not', ['erDateFin' => null],
        ]
    ]);

$query->orWhere(
    ['and',
        [
            'between',
            'str_to_date(\'' . $this->dateRecherche . '\', \'%d/%m/%Y %H:%i\')',
            new Expression('str_to_date(erDateDebut, \'%d/%m/%Y %H:%i\')'),
            new Expression('now()'),
        ],
        [
            'is', 'erDateFin', null,
        ]
    ]);

您甚至可以将其全部放入一个 where 方法调用中：

$query->where(
    ['or',
        ['and',
            [
                'between',
                'str_to_date(\'' . $this->dateRecherche . '\', \'%d/%m/%Y %H:%i\')',
                new Expression('str_to_date(erDateDebut, \'%d/%m/%Y %H:%i\')'),
                new Expression('str_to_date(erDateFin, \'%d/%m/%Y %H:%i\')'),
            ],
            [
                'not', ['erDateFin' => null],
            ]
        ],
        ['and',
            [
                'between',
                'str_to_date(\'' . $this->dateRecherche . '\', \'%d/%m/%Y %H:%i\')',
                new Expression('str_to_date(erDateDebut, \'%d/%m/%Y %H:%i\')'),
                new Expression('now()'),
            ],
            [
                'is', 'erDateFin', null,
            ]
        ]
    ]);

我用过 where method, not the filterWhere methods, because you probably don't want to remove empty operands from the query. More information about filtering can be found here. where 也记录了 and 和 or 运算符。

您可能已经知道，计数可以用

完成

$count = $query->count();

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