laravel中collection的作用是什么

今天就跟大家聊聊有关laravel中collection的作用是什么，可能很多人都不太了解，为了让大家更加了解，小编给大家总结了以下内容，希望大家根据这篇文章可以有所收获。

pluck

public function getDeductCourse()    {        return TeacherFinanceLogModel::select(['order_id', 'period'])->where('type', 6)            ->get()->pluck('period', 'order_id')->all();    }

group map keyBy

public function getStudentCourseByUids($uids)    {        $studentCourse = $this->studentCourseModel            ->select(['uid', 'grade_type', 'subject', 'period', 'old_period', 'period_total', 'finish_period', 'wait_period', 'total_free_period', 'free_period', 'wait_free_period'])            ->whereIn('uid', $uids)            ->get();        return collect($studentCourse)->groupBy('uid')->map(function ($item) {            return $item->keyBy(function ($value) {                    return sprintf("%s-%s-%s", $value['uid'], $value['grade_type'], $value['subject']);                })->toArray();        })->toArray();    }

filter

public function getRewardsAndPunishByUid($uids)    {        $rewardPunish = $this->courseRewardsModel            ->select([                "course.uid",                "course.grade_type",                "course.subject",                "course.course_type",                "course.period_type",                "course.course_id",                "course.tid",                "course_rewards.s_rewards",                "course_rewards.t_rewards",                "course_rewards.s_option_status",                "course_rewards.t_option_status"            ])            ->leftjoin("course", "course.course_id", "=", "course_rewards.course_id")            ->whereIn('course.uid', $uids)            ->where("course.course_type", 1)            ->get();        return collect($rewardPunish)->filter(function ($item) {            return ($item->s_rewards == 1 || $item->s_rewards == -1) && $item->s_option_status != 1;        })->groupBy('uid')->map(function ($item) {            return [                'reward_total' => $item->filter(function ($value) {                    return $value->s_rewards == 1;                })->sum('s_rewards'),                'punish_total' => abs($item->filter(function ($value) {                    return $value->s_rewards == -1;                })->sum('s_rewards'))            ];        })->toArray();    }

看完上述内容，你们对laravel中collection的作用是什么有进一步的了解吗？如果还想了解更多知识或者相关内容，请关注行业资讯频道，感谢大家的支持。