I've encountered a coding challenge that has led me to this code snippet:
ngOnInit(): void
{
this.categories = this.categoryService.getCategories();
var example = this.categories.flatMap((categor) => categor.map((categories) => {
var links = this.categoryService.countCategoryLinks(categories.id)
.subscribe(valeur => console.log(valeur));
return categories.id
}));
}
The outcome produces two observables. One contains a list of categories, while the other displays the count of items for each specific category.
My inquiry is as follows:
How can I efficiently structure all this information into a unified data format? I aim to group both categories and their respective item counts in a single data structure for seamless representation in my TS component.
After debugging step by step, I have revised the code and achieved a near solution:
this.categories = this.categoryService.getCategories();
var example = this.categories.mergeMap((categor) => categor.map((myCateg) =>
{
this.categoryService.countCategoryLinks(myCateg.id)
.map(numlinks => Object.assign(myCateg,{numLinks: numlinks}))
.subscribe(valeur => console.log(valeur));
return myCateg.id
}));
This implementation results in the following output:
https://i.stack.imgur.com/gOeFT.png
However, the numLinks property remains an object... (containing the count value). Any suggestions on transforming it into a JSON property like categoryName or id??
Your assistance is highly appreciated!
Finally, here's the solution to address the issue:
ngOnInit(): void
{
this.categories = this.categoryService.getCategories();
const example = this.categories
.mergeMap((categor) => categor
.map((myCateg) => {
this.categoryService.countCategoryLinks(myCateg.id)
.map(numlinks => {
myCateg.numlinks = numlinks.count;
return myCateg;
})
//Object.assign(myCateg,{numLinks: numlinks}))
.subscribe(value => console.log(value));
return myCateg
}));
example.subscribe(val => console.log("value2: "+val));
}