Refine the observable data

Trying to filter a list of items from my Firebase database based on location.liked === true has been a challenge for me. I've attempted using the traditional filter array method but have not had success. Can anyone suggest an alternative method to accomplish this task?

this.locations = af.database.list('/trips')
  .map((locations) => {
    return locations.map((location) => {
      location.liked = af.database.object(`/likes/${this.uid}/${location.$key}`);
      return location;
    })
  });

Initially, I tried implementing the following logic:

this.filteredResult = locations.map((locations) => {
 return locations.filter((location) => {
  return location.liked
 })
})

However, I encountered an error stating that any[] cannot be filtered.

Answer №1

Have you considered attempting a solution similar to the one below?

this.locations = af.database.list('/trips').filter((location) => {
    return location.liked === true;
});   

Take a look at this demonstration for reference:

https://plnkr.co/edit/U9p7LHFsYIXeFiJkIiRs?p=preview

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