问题描述

假设我有一张表格，其中包含有关节日的信息.
每个节日都有开始和结束日期.

Lets say I have a table that holds information about festivals.
Each festival has a start and end date.

我想选择在给定日期现场(发生)的所有节日.

I want to select all the festivals that are live (that happen) on a given date.

意思是，我想选择开始日期早于或在给定日期，而结束日期晚于或在同一给定日期的所有节日.

Meaning, I want to select all the festivals that their start date is before or on a given date, and that their end date is after or on a the same given date.

所以我继续使用节日实体的存储库类，并创建了一个方法来做到这一点.
但是标准参数findBy"期望是一个数组，所有示例仅将其视为一个简单的条件(例如，array('name' => 'billy')"将选择名称列中具有值 billy 的所有行)，其中仅使用比较运算符.

So I went on to the repository class of the festival entity, and created a method to do just that.
But the criteria argument "findBy" expects is an array, which all the examples only treat as a simple criteria (e.g. "array('name' => 'billy')" will select all the rows that have the value billy in their name column), which uses only the comparison operator.

如何使用其他运算符，例如

How can I use other operators such as

>, <, !=, IN, NOT IN, LIKE    

等等?

推荐答案

如果您需要特定的查询，则需要编写自己的查询(可能使用 DQL).我相信内置的findBy"方法更适合用于快速抓取对象，如果您的标准不那么具体.我不知道您的实体名称或它们的存储位置.可能是您的 Festival Repository 中的一个函数.

You'll need to write your own query (probably using DQL) if you want something that specific. I believe the built in "findBy" methods are more for just grabbing objects quickly if you have less specific criteria. I don't know your entity names or where they are stored. Could be something like this as a function in your Festival Repository.

public function findActiveFestivals($start, $end)
{
    $qb = $this->_em->createQueryBuilder();
    $qb->select('f')
        ->from('Festival', 'f')
        ->where('f.start >= :start')
        ->andWhere('f.end <= :end')
        ->setParameters(array('start' => $start, 'end' => $end));

    return $qb->getQuery()->getArrayResult();
}

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