将一个元素插入另一个列表中的嵌套变量上的状态

Question

I have a json of this type:

object:{

   object2:[
    {
      test:[
       {
       }
      ],
      name:''
    }
   ]

}

What I want to do is to set the state of a certain test element and what I did was this:

this.setState(prevState => ({
        object: {
            ...prevState.object,
            object2: {
                ...prevState.object.object2[indexObject2],
                test: [
                    ...newTest
                ]
            }
        }
    }))

But when I do this the error this.state.object.object2.map is not a function occurs. Thanks!

Answer 1

You can try

this.setState(prevState => ({
    object: {
        ...prevState.object,
        object2: {
            ...prevState.object.object2,
            {
                ...prevState.object.object2[indexObject2],
                test: [
                    ...newTest
                ]
            }                
        }
    }
}))

Answer 2

You are setting object2 as an Object , it should be an Array

object2: {
    ...prevState.object.object2[indexObject2],
    test: [
        ...newTest
    ]
}

Should be

object2: [
    ...prevState.object.object2[indexObject2],
    test: [
        ...newTest
    ]
]