https://www.avuejs.com/crud/crud-search.html#%E8%87%AA%E5%AE%9A%E4%B9%89%E5%88%97%E6%90%9C%E7%B4%A2

column:

      {
        label: "所属课程/课节",
        prop: "courseLesson",
        overHidden: true,
        search: true,
        searchslot: true,
        searchLabelWidth: 120,
        hide: true
      },

插槽：

      <template slot="courseLessonSearch">
        <el-cascader
          :props="courseLessonCascaderProps"
          v-model="search.associate_course_lesson_ids"
          placeholder="所属课程/课节"
          clearable
          filterable
        ></el-cascader>
      </template>