如何在Laravel 5中熱切加載多個嵌套子關系？

Question

我有一個故障的復雜數據結構：

Event: top-level object
|-Streams: events can contain multiple streams of information / data capture
  |-Datacapture: each stream can have up to 4 datacapture records
  |-Overlay: each stream can have many overlays
  | |-Frames: each overlay can have many frames
  |-Background: each stream can have many backgrounds
  | |-Frames: each background can have many frames
  |-Experiences: each stream can have up to 6 experiences
    |-Selectors: each experience can have many selectors
      |-Filters: each selector can have one filter
      |-Props: each selector can have one prop (whether it has a filter or no)
      | |-Frames: each prop can have many frames
      |-Overlay: each selector can have one overlay
      | |-Frames: each overlay can have many frames
      |-Background: each selector can have one background
      | |-Frames: each background can have many frames

這只是難題的一部分-體驗和信息流附加了更多的對象，但是我認為這很重要。

理想情況下，我希望做的是創建一個渴望加載查詢，該查詢可以加載並返回包含所有組成部分的完整EVENT集合。

我知道我可以渴望與with(['blah','plop'])加載多個關系，並且我可以與with('blah.plop')加載嵌套的關系，甚至可以通過with(['blah.plop','blah.somethingelse']) ，但是我的情況顯然更加復雜。

我想避免像這樣分別加載每個“子關系”

$event = event::with([
    'streams.datacaptures',
    'streams.overlay.frames',
    'streams.background.frames',
    'streams.experiences.selectors.filters',
    'streams.experiences.selectors.props.frames',
    'streams.experiences.selectors.overlay.frames',
    'streams.experiences.selectors.background.frames'
    ])->find($eventcode);

我能做些更整潔的東西嗎？

Answer 1

好吧，我不知道這對您來說是否更整潔/更清潔。

渴望與模型事件建立負載關系

protected $with = ['streams'];

同樣去其他..與流

protected $with = ['datacaptures','overlay','background','experiences'];

在背景和疊加中

protected $with = ['frames'];

等等 ..

默認情況下，這將調用模型具有的所有關系..但缺點是即使您不需要它也將渴望加載。

所以你只需要

$event = event::find($eventcode);