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[英]Ramda js: lens for deeply nested objects with nested arrays of objects
[英]Merge two arrays with deeply nested key with Ramda
我最近开始使用Ramda处理来自JSONAPI的响应。 对于如何使用深层嵌套的键合并两个对象,我有些困惑。
例如:
拿这两组数据,
const users = [
{ id: 1,
attributes: {
firstName: "Bob",
lastName: "Lee"
},
relationships: {
phone: {
data: {
id: 2,
type: "phone"
}
}
},
type: "users"
},
{ id: 2,
attributes: {
firstName: "Kevin",
lastName: "Smith"
},
relationships: {
phone: {
data: {
id: 5,
type: "phone"
}
}
},
type: "users"
},
];
const phones= [
{ id: 2,
attributes: {
phoneNumber: "123-345-6789"
},
type: "phones"
},
{ id: 5,
attributes: {
phoneNumber: "987-654-4321"
},
type: "phones"
},
];
我要创建的是一个新阵列,将相关手机添加到用户阵列中,并带有一个包含所有相关对象的新键,如下所示:
const newUser =
[
{ id: 1,
attributes: {
firstName: "Bob",
lastName: "Lee"
},
relationships: {
phone: {
data: {
id: 2,
type: "phones"
}
}
},
included: {
phoneNumber: "123-345-6789"
}
},
{ id: 2,
attributes: {
firstName: "Kevin",
lastName: "Smith"
},
relationships: {
phone: {
data: {
id: 5,
type: "phones"
}
}
},
type: "users",
included: {
phoneNumber: "987-654-4321"
}
}
]
我尝试了多种方法,例如map,pick和join,但是这些对象似乎并不想按照我希望的方式进行合并。 以下代码将两个对象放入同一数组中,但是我似乎无法将下一步继续前进。
const data = R.pipe(
R.juxt([
R.pipe(R.path(['users'])),
R.pipe(R.path(['phones']))
]),
)
}),
这是我的第一种方法:
const {map, path, find, propEq, assoc} = R const addPhones = (phones, users) => map(user => { const phoneId = path(['relationships', 'phone', 'data', 'id'], user) const phone = find(propEq('id', phoneId), phones) return phone ? assoc('included', phone.attributes, user) : user }, users) const users = [{"attributes": {"firstName": "Bob", "lastName": "Lee"}, "id": 1, "relationships": {"phone": {"data": {"id": 2, "type": "phone"}}}, "type": "users"}, {"attributes": {"firstName": "Kevin", "lastName": "Smith"}, "id": 2, "relationships": {"phone": {"data": {"id": 5, "type": "phone"}}}, "type": "users"}, {"attributes": {"firstName": "Nancy", "lastName": "Johnson"}, "id": 3, "relationships": {"phone": {"data": {"id": 6, "type": "phone"}}}, "type": "users"}] const phones= [{"attributes": {"phoneNumber": "123-345-6789"}, "id": 2, "type": "phones"}, {"attributes": {"phoneNumber": "987-654-4321"}, "id": 5, "type": "phones"}, {"attributes": {"phoneNumber": "212-867-5309"}, "id": 7, "type": "phones"}] console.log(addPhones(phones, users))
<script src="//cdnjs.cloudflare.com/ajax/libs/ramda/0.25.0/ramda.js"></script>
此版本适当处理了两个列表中的缺失值。 如果存在没有匹配电话的用户,则该用户将按原样返回,没有included
属性。 如果有一部电话没有匹配的用户,则将其忽略。
这假定您可以在用户中包括整个phone.attributes
对象。 如果您只需要包含phoneNumber
,则只需稍微复杂一点,用替换明显的行即可
? assocPath(['included', 'phoneNumber'], phone.attributes.phoneNumber, user)
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