[英]Creating an array destructing a nested object
I need to create an array of the id:
's within the entity:
variable nested within the stakes
variable in the object proposal
.我需要在entity:
中创建一个id:
的数组,该变量嵌套在 object proposal
中的stakes
变量中。 When I use this code to destructure the object:当我使用此代码解构 object 时:
const {
stakes: {
entity: { id: SupportersId },
},
} = proposal
console.log(SupportersId)
I get the error: TypeError: Cannot read property 'id' of undefined
我收到错误: TypeError: Cannot read property 'id' of undefined
This is a `stakes' variable example nested within the proposal object that I am applying the code to:这是一个嵌套在提案 object 中的“赌注”变量示例,我将代码应用于:
0:
amount: BigNumber
c: [100000]
e: 19
s: 1
__proto__: Object
createdAt: 1616006864000
entity: {id: "0x60893...734",
__typename: "Supporter"}
id: "appAddress:0x8blahblah...entity:0x608same"
proposal: null
type: "Add"
So when I run:所以当我运行时:
const {stakes} = proposal
console.log(stakes)
I get the above object.我得到了上面的 object。 When running:运行时:
const {stakes: {entity}, }= proposal
I get:我得到:
4 Undefined
10 Undefined
10 Undefined
...
A number that doesnt seem to have any relevance to what it is that I am dealing with.一个似乎与我正在处理的内容没有任何关系的数字。 Hopefully someone can help me with this.希望有人可以帮助我。 I feel like I need to add an index number to the variable in the way that you would when mapping through an array to create an element however, I am also not certain on what that would look like either, sadly.我觉得我需要像通过数组映射以创建元素时那样向变量添加索引号,但是,遗憾的是,我也不确定它会是什么样子。 Ultimately I am going to pass this list as a child to another function that will map through it in another form in my app to pull image and profile data from the id to create a "personal card" if that helps.最终,我将把这个列表作为一个孩子传递给另一个 function,它将 map 在我的应用程序中以另一种形式通过它,从 id 中提取图像和配置文件数据以创建“个人卡”,如果有帮助的话。 Any help or advice would be greatly appreciated, thanks!任何帮助或建议将不胜感激,谢谢!
Here's a counterexample that destructures correctly.这是一个正确解构的反例。 I suspect the difference between this and your situation is that your proposal.stakes
is likely an array, which I infer from the 0:
in your output.我怀疑这与您的情况之间的区别在于您的proposal.stakes
可能是一个数组,我从0:
在您的 output 中。
const proposal = { stakes: { amount: 10n, c: [100000], e: 19, s: 1, createdAt: 1616006864000, entity: { id: "0x60893...734", __typename: "Supporter" }, id: "appAddress:0x8blahblah...entity:0x608same", proposal: null, type: "Add", } }; const { stakes: { entity: { id: SupportersId }, }, } = proposal; console.log(SupportersId) const {stakes: {entity}, }= proposal; console.log(entity);
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