Question

我有以下方法返回CourseTypes，包括相关的courses。（enrolments并不重要。）

我刚才注意到的是，如果我在第2行添加.order(:order)，则会忽略每个where条件。这意味着包含expired和cancelled课程。

当我省略.order(:order)时，不包括这些（不需要的）课程。

为什么会这样，如何在不丢失过滤器选项的情况下正确地订购CourseTypes数组/ activerecord关系？

  def course_types
    CourseType.order(:order).
      includes(courses: :enrolments).
      where.not("title LIKE ?" , "%Test%").
      where(courses: {
        expired: false,
        cancelled: false,
      })
  end

谢谢！

更新

生成的查询没有.order(:order)：

我已排除查询中的.enrolments以缩短输出，并且我已在查询中翻译了db字段以匹配我在初始问题中使用的英文名称。

SQL（0.5ms）SELECT＆＃34; course_types＆＃34;。＆＃34; id＆＃34; AS t0_r0，＆＃34; course_types＆＃34;。＆＃34; title＆＃34; AS t0_r1，＆＃34; course_types＆＃34;。＆＃34; description＆＃34; AS t0_r2，＆＃34; course_types＆＃34;。＆＃34; created_at＆＃34; AS t0_r3，＆＃34; course_types＆＃34;。＆＃34; updated_at＆＃34; AS t0_r4，＆＃34; course_types＆＃34;。＆＃34; order＆＃34; AS t0_r5，＆＃34; course_types＆＃34;。＆＃34;价格＆＃34; AS t0_r6，＆＃34; course_types＆＃34;。＆＃34;席位＆＃34; AS t0_r7，＆＃34; course_types＆＃34;。＆＃34; days＆＃34; AS t0_r8，＆＃34; course_types＆＃34;。＆＃34; ue＆＃34; AS t0_r9，＆＃34;课程＆＃34;。＆＃34; id＆＃34; AS t1_r0，＆＃34;课程＆＃34;。＆＃34; titel＆＃34; AS t1_r1，＆＃34;课程＆＃34;。＆＃34; startdate＆＃34; AS t1_r2，＆＃34;课程＆＃34;。＆＃34; enddate＆＃34; AS t1_r3，＆＃34;课程＆＃34;。＆＃34;内容＆＃34; AS t1_r4，＆＃34;课程＆＃34;。＆＃34;观众＆＃34; AS t1_r5，＆＃34;课程＆＃34;。＆＃34;时间＆＃34; AS t1_r6，＆＃34;课程＆＃34;。＆＃34;范围＆＃34; AS t1_r7，＆＃34;课程＆＃34;。＆＃34;分数＆＃34; AS t1_r8，＆＃34;课程＆＃34;。＆＃34;导师＆＃34; AS t1_r9，＆＃34;课程＆＃34;。＆＃34;地点＆＃34; AS t1_r10，＆＃34;课程＆＃34;。＆＃34;活跃＆＃34; AS t1_r11，＆＃34;课程＆＃34;。＆＃34; created_at＆＃34; AS t1_r12，＆＃34;课程＆＃34;。＆＃34; updated_at＆＃34; AS t1_r13，＆＃34;课程＆＃34;。＆＃34;类别＆＃34; AS t1_r14，＆＃34;课程＆＃34;。＆＃34;已过期＆＃34; AS t1_r15，＆＃34;课程＆＃34;。＆＃34;价格＆＃34; AS t1_r16，＆＃34;课程＆＃34;。＆＃34;取消＆＃34; AS t1_r17，＆＃34;课程＆＃34;。＆＃34;笔记＆＃34; AS t1_r18，＆＃34;课程＆＃34;。＆＃34; url＆＃34; AS t1_r19，＆＃34; course＆＃34;。＆＃34; course_type_id＆＃34; AS t1_r20 FROM＆＃34; course_types＆＃34; LEFT OUTER JOIN＆＃34;课程＆＃34; ON＆＃34;课程＆＃34;。＆＃34; course_type_id＆＃34; =＆＃34; course_types＆＃34;。＆＃34; id＆＃34;在哪里（不是（标题LIKE＆＃39;％Test％＆＃39;））和＆＃34;课程＆＃34;。＆＃34;活跃＆＃34; = $ 1 AND＆＃34;课程＆＃34;。＆＃34;已过期＆＃34; = $ 2 AND＆＃34;课程＆＃34;。＆＃34;取消＆＃34; = $ 3 [[＆＃34;活跃＆＃34;，＆＃34; t＆＃34;]，[＆＃34;过期＆＃34;，＆＃34; f＆＃34;]，[＆＃34;取消＆＃ 34;，＆＃34; f＆＃34;]]

使用.oder(:order)生成查询：

SQL（1.0ms）SELECT＆＃34; course_types＆＃34;。＆＃34; id＆＃34; AS t0_r0，＆＃34; course_types＆＃34;。＆＃34; title＆＃34; AS t0_r1，＆＃34; course_types＆＃34;。＆＃34; description＆＃34; AS t0_r2，＆＃34; course_types＆＃34;。＆＃34; created_at＆＃34; AS t0_r3，＆＃34; course_types＆＃34;。＆＃34; updated_at＆＃34; AS t0_r4，＆＃34; course_types＆＃34;。＆＃34; order＆＃34; AS t0_r5，＆＃34; course_types＆＃34;。＆＃34;价格＆＃34; AS t0_r6，＆＃34; course_types＆＃34;。＆＃34;席位＆＃34; AS t0_r7，＆＃34; course_types＆＃34;。＆＃34; days＆＃34; AS t0_r8，＆＃34; course_types＆＃34;。＆＃34; ue＆＃34; AS t0_r9，＆＃34;课程＆＃34;。＆＃34; id＆＃34; AS t1_r0，＆＃34;课程＆＃34;。＆＃34; titel＆＃34; AS t1_r1，＆＃34;课程＆＃34;。＆＃34; startdate＆＃34; AS t1_r2，＆＃34;课程＆＃34;。＆＃34; enddate＆＃34; AS t1_r3，＆＃34;课程＆＃34;。＆＃34;内容＆＃34; AS t1_r4，＆＃34;课程＆＃34;。＆＃34;观众＆＃34; AS t1_r5，＆＃34;课程＆＃34;。＆＃34;时间＆＃34; AS t1_r6，＆＃34;课程＆＃34;。＆＃34;范围＆＃34; AS t1_r7，＆＃34;课程＆＃34;。＆＃34;分数＆＃34; AS t1_r8，＆＃34;课程＆＃34;。＆＃34;导师＆＃34; AS t1_r9，＆＃34;课程＆＃34;。＆＃34;地点＆＃34; AS t1_r10，＆＃34;课程＆＃34;。＆＃34;活跃＆＃34; AS t1_r11，＆＃34;课程＆＃34;。＆＃34; created_at＆＃34; AS t1_r12，＆＃34;课程＆＃34;。＆＃34; updated_at＆＃34; AS t1_r13，＆＃34;课程＆＃34;。＆＃34;类别＆＃34; AS t1_r14，＆＃34;课程＆＃34;。＆＃34;已过期＆＃34; AS t1_r15，＆＃34;课程＆＃34;。＆＃34;价格＆＃34; AS t1_r16，＆＃34;课程＆＃34;。＆＃34;取消＆＃34; AS t1_r17，＆＃34;课程＆＃34;。＆＃34;笔记＆＃34; AS t1_r18，＆＃34;课程＆＃34;。＆＃34; url＆＃34; AS t1_r19，＆＃34; course＆＃34;。＆＃34; course_type_id＆＃34; AS t1_r20 FROM＆＃34; course_types＆＃34; LEFT OUTER JOIN＆＃34;课程＆＃34; ON＆＃34;课程＆＃34;。＆＃34; course_type_id＆＃34; =＆＃34; course_types＆＃34;。＆＃34; id＆＃34;在哪里（不是（标题LIKE＆＃39;％Test％＆＃39;））和＆＃34;课程＆＃34;。＆＃34;活跃＆＃34; = $ 1 AND＆＃34;课程＆＃34;。＆＃34;已过期＆＃34; = $ 2 AND＆＃34;课程＆＃34;。＆＃34;取消＆＃34; = $ 3 ORDER BY＆＃34; course_types＆＃34;。＆＃34; order＆＃34; ASC [[＆＃34;活跃＆＃34;，＆＃34; t＆＃34;]，[＆＃34;已过期＆＃34;，＆＃34; f＆＃34;]，[＆＃34;已取消＆＃34 ;，＆＃34; f＆＃34;]]

如果它很重要，我使用rails v 4.2.7。

使用.order无效.where条件

0 个答案: