Ramda：如何使用嵌套对象过滤数据？

Question

const articles = [    {title: 'title 1', published: false, pages: 30, tags: {name: 'work', id: 1, visibility: "everyone"}},    {title: 'title 2', published: false, pages: 25, tags: {name: 'home', id: 3, visibility: "myself"}},    {title: 'title 3', published: true, pages: 30, tags: {name: 'vacation', id: 5, visibility: "myself"}}];我的 JSON 数据看起来像这样，我需要根据published true 和visibility我自己的值进行过滤。我怎样才能以有效的方式实现这一目标？对此有任何帮助将不胜感激。到目前为止，我只能使用单个属性进行过滤  R.filter(R.propEq("published", false))(articles);

Answer 1

像这样的东西：

R.filter(

  R.allPass([

    R.propEq("published", false),

    R.pathEq(["tags", "visibility"], "myself")

  ])

)(articles);

Answer 2

您可以使用规范对象：

const predicate = R.where({

  published: R.equals(true),

  tags: R.where({

    visibility: R.equals('myself'),

  }),

});

// ==

const data = [

  {title: 'title 1', published: false, pages: 30, tags: {name: 'work', id: 1, visibility: "everyone"}},

  {title: 'title 2', published: false, pages: 25, tags: {name: 'home', id: 3, visibility: "myself"}},

  {title: 'title 3', published: true, pages: 30, tags: {name: 'vacation', id: 5, visibility: "myself"}}

];

console.log(

  R.filter(predicate, data),

);

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