Laravel - 同时联合 + 分页?

  
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问题描述

简介:

我正在尝试合并 2 个表 recipes 和 posts，然后将 ->paginate(5) 添加到查询中.

I am trying to union 2 tables recipes and posts then add ->paginate(5) to the queries.

但由于某种原因，我收到此错误:

But for some reason I get this error:

基数违规:1222 使用的 SELECT 语句有一个不同的列数(SQL:(选择计数(*)作为聚合来自帖子

Cardinality violation: 1222 The used SELECT statements have a different number of columns (SQL: (select count(*) as aggregate from posts

代码:

$recipes = DB::table("recipes")->select("id", "title", "user_id", "description", "created_at")
                    ->where("user_id", "=", $id);

$items = DB::table("posts")->select("id", "title", "user_id", "content", "created_at")
                ->where("user_id", "=", $id)
                ->union($recipes)
                ->paginate(5)->get();

我做错了吗?

没有 ->paginate(5) 查询工作正常.

Without ->paginate(5) the query works fine.

推荐答案

你说得对，分页导致问题.现在，您可以创建一个视图并查询该视图而不是实际的表，或手动创建您的 Paginator:

You're right, pagination cause problem. Right now, you can create a view and query the view instead of the actual tables, or create your Paginator manually: 

$page = Input::get('page', 1);
$paginate = 5;

$recipes = DB::table("recipes")->select("id", "title", "user_id", "description", "created_at")
            ->where("user_id", "=", $id);
$items = DB::table("posts")->select("id", "title", "user_id", "content", "created_at")
            ->where("user_id", "=", $id)
            ->union($recipes)
            ->get();

$slice = array_slice($items->toArray(), $paginate * ($page - 1), $paginate);
$result = Paginator::make($slice, count($items), $paginate);

return View::make('yourView',compact('result'));

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