redux返回的对象属性无法访问

Question

访问redux返回的对象属性时出错-无法读取未定义的属性'id' 我有一个由redux select函数返回的对象，我可以注销该对象

console.log(category)

但是当我尝试访问其属性时，它会引发错误-无法读取未定义的属性'id'

console.log(category.id)

请帮助

CategorySlice.js 从'@ reduxjs / toolkit'导入{createSlice，createEntityAdapter，createAsyncThunk，createReducer} 从“ axios”导入axios

export const getCategoryData = createAsyncThunk('category/getProductData', async id => {  
    
    const category = await axios.get(
        `http://localhost:8000/category/${id}`
    )
    return category.data
})

export const categoryAdapter=createEntityAdapter({})

export const {
    selectById: selectCategoryById
} = categoryAdapter.getSelectors(state => state.inventory.categories.category)


const selectedCategorySlice = createSlice({
    name: 'category',
    initialState:categoryAdapter.getInitialState(),
    reducers: {
        // selectedCategory:(state,action)=>state.push(action.payload)
    },
    extraReducers: {
        // [getCategoryData.fulfilled]: (state, action) => action.payload
        // createReducer(initialState,
            // [getCategoryData.fulfilled]
        [getCategoryData.fulfilled]: categoryAdapter.addOne
    }

})

export const { selectedCategory } = selectedCategorySlice.actions

export default selectedCategorySlice.reducer

Category.js

const category1 = useSelector(state => selectCategoryById(state, id))

console.log(category1)-->Working-print the object
console.log(category1.id)--> This gives an error Cannot read property 'id' of undefined