te')); return $arr; } /* 遍历用户所有主题 * @param $uid 用户ID * @param int $page 页数 * @param int $pagesize 每页记录条数 * @param bool $desc 排序方式 TRUE降序 FALSE升序 * @param string $key 返回的数组用那一列的值作为 key * @param array $col 查询哪些列 */ function thread_tid_find_by_uid($uid, $page = 1, $pagesize = 1000, $desc = TRUE, $key = 'tid', $col = array()) { if (empty($uid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('uid' => $uid), array('tid' => $orderby), $page, $pagesize, $key, $col); return $arr; } // 遍历栏目下tid 支持数组 $fid = array(1,2,3) function thread_tid_find_by_fid($fid, $page = 1, $pagesize = 1000, $desc = TRUE) { if (empty($fid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('fid' => $fid), array('tid' => $orderby), $page, $pagesize, 'tid', array('tid', 'verify_date')); return $arr; } function thread_tid_delete($tid) { if (empty($tid)) return FALSE; $r = thread_tid__delete(array('tid' => $tid)); return $r; } function thread_tid_count() { $n = thread_tid__count(); return $n; } // 统计用户主题数 大数量下严谨使用非主键统计 function thread_uid_count($uid) { $n = thread_tid__count(array('uid' => $uid)); return $n; } // 统计栏目主题数 大数量下严谨使用非主键统计 function thread_fid_count($fid) { $n = thread_tid__count(array('fid' => $fid)); return $n; } ?>javascript - ERROR TypeError: Cannot read property 'filter' of undefined. How do I fix this? - Stack Overflow

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    你的位置： 首页>programmer>javascript - ERROR TypeError: Cannot read property 'filter' of undefined. How do I fix this? - Stack Overflow

    javascript - ERROR TypeError: Cannot read property 'filter' of undefined. How do I fix this? - Stack Overflow

    programmeradmin2浏览0评论

    I am using custom filter to create the sort order from but least first followed by next but getting error "ERROR TypeError: Cannot read property 'filter' of undefined".

    Please help me to fix as it's not allowing to render anything on page.

    What changes do I need to make to fix this? Any help is appreciated.

    table-filter.pipe.ts

    import { Pipe, PipeTransform } from "@angular/core";

@Pipe({
  name: "tableFilter"
})
export class TableFilterPipe implements PipeTransform {
  transform(list: any[], filters: any) {
    //console.log("table-filter", list);
    const keys = Object.keys(filters).filter(key => filters[key]);
    const filterUser = (user: { [x: string]: any }) =>
      keys.every(key => {
        if (key == "sdob") {
          return (
            new Date(user["dob"]) >=
            new Date(new Date(filters[key]).setHours(0, 0, 0, 0))
          );
        } else if (key == "edob") {
          return (
            new Date(new Date(filters[key]).setHours(0, 0, 0, 0)) >=
            new Date(user["dob"])
          );
        } else if (
          key === "dl" &&
          user["assigned_to"].filter((e: { dl: any }) => e.dl === filters[key])
            .length
        ) {
          return user;
        } else if (key === "score") {
          const low = filters[key] === "20" && user["score"] <= filters[key];
          const medium =
            filters[key] === "50" && user["score"] < 50 && user["score"] >= 21;
          const high =
            filters[key] === "70" && user["score"] < 70 && user["score"] >= 51;
          const veryHigh = filters[key] === "71" && user["score"] >= 71;
          if (low || medium || high || veryHigh) {
            return user[key];
          }
        } else {
          return user[key] === filters[key];
        }
    });    

    if(list) {
      let filterList = list.filter(filterUser);
      list.sort((lhs, rhs) =>this.lowestScore(lhs.assigned_to) - this.lowestScore(rhs.assigned_to));
    }
    //console.log(filterList, list);

    return keys.length ? list.filter(filterUser) : list;
  }
  
  lowestScore(assign: any) {
    //console.log("assign ", assign);
    let filterData = assign.filter(item => Number(item.co_score));
    let leastScrore = Math.min(...filterData.map(item => item.co_score));
    //console.log("least ", leastScrore);
    return leastScrore;
  }
}

    I am using custom filter to create the sort order from but least first followed by next but getting error "ERROR TypeError: Cannot read property 'filter' of undefined".

    Please help me to fix as it's not allowing to render anything on page.

    What changes do I need to make to fix this? Any help is appreciated.

    table-filter.pipe.ts

    import { Pipe, PipeTransform } from "@angular/core";

@Pipe({
  name: "tableFilter"
})
export class TableFilterPipe implements PipeTransform {
  transform(list: any[], filters: any) {
    //console.log("table-filter", list);
    const keys = Object.keys(filters).filter(key => filters[key]);
    const filterUser = (user: { [x: string]: any }) =>
      keys.every(key => {
        if (key == "sdob") {
          return (
            new Date(user["dob"]) >=
            new Date(new Date(filters[key]).setHours(0, 0, 0, 0))
          );
        } else if (key == "edob") {
          return (
            new Date(new Date(filters[key]).setHours(0, 0, 0, 0)) >=
            new Date(user["dob"])
          );
        } else if (
          key === "dl" &&
          user["assigned_to"].filter((e: { dl: any }) => e.dl === filters[key])
            .length
        ) {
          return user;
        } else if (key === "score") {
          const low = filters[key] === "20" && user["score"] <= filters[key];
          const medium =
            filters[key] === "50" && user["score"] < 50 && user["score"] >= 21;
          const high =
            filters[key] === "70" && user["score"] < 70 && user["score"] >= 51;
          const veryHigh = filters[key] === "71" && user["score"] >= 71;
          if (low || medium || high || veryHigh) {
            return user[key];
          }
        } else {
          return user[key] === filters[key];
        }
    });    

    if(list) {
      let filterList = list.filter(filterUser);
      list.sort((lhs, rhs) =>this.lowestScore(lhs.assigned_to) - this.lowestScore(rhs.assigned_to));
    }
    //console.log(filterList, list);

    return keys.length ? list.filter(filterUser) : list;
  }
  
  lowestScore(assign: any) {
    //console.log("assign ", assign);
    let filterData = assign.filter(item => Number(item.co_score));
    let leastScrore = Math.min(...filterData.map(item => item.co_score));
    //console.log("least ", leastScrore);
    return leastScrore;
  }
}
    • javascript
    • angular
    • typescript
    • undefined
    Share Improve this question asked Jan 14, 2021 at 5:45 Kunal VijanKunal Vijan 4452 gold badges10 silver badges34 bronze badges 4
    • put a check at the beginning if(!filters){ return list} – Nilesh Patel Commented Jan 14, 2021 at 5:51
    • @NileshPatel where do I update this? – Kunal Vijan Commented Jan 14, 2021 at 5:55
    • before const keys = Object.keys(filters).filter(key => filters[key]);. it may be breaking at one more place.. but try this – Nilesh Patel Commented Jan 14, 2021 at 6:02
    • @NileshPatel list is undefined – Kunal Vijan Commented Jan 14, 2021 at 6:04
    Add a ment  | 

    4 Answers 4

    Reset to default 3

    The error indicates that one of the objects you are calling ".filter" on is undefined. That would be one of these lines:

    const keys = Object.keys(filters).filter

    • will fail if "filters" has no keys. This looks like a likely candidate if you aren't passing filters to your transform function.

    user["assigned_to"].filter

    • will fail if user doesn't have this property or if it isn't an array.

    let filterData = assign.filter

    • will fail if lowestScore is passed undefined

    Depending on your browser, you could also do:

    return list?.filter(filterUser) || list

    The error message is plaining this:

    return keys.length ? list.filter(filterUser) : list;

    When your list is undefined, and you have keys, it will try to do list.filter, since list is undefined, you got such error.

    Try installing

    ng g pipe searchFilter

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