How to get information from every element of an array in GROQ query?

I understand you're trying to get information from every element of an array in your GROQ query, but you're currently only getting one element. Without seeing your specific query, I can provide you with the general pattern for working with arrays in GROQ.

The key difference is between using bracket notation with an index versus using empty brackets to get all elements:

Getting a single element (what you're probably doing now):

*[_type == 'movie']{
  title,
  'firstActor': castMembers[0].person->name
}

Getting all elements from the array:

*[_type == 'movie']{
  title,
  'allActors': castMembers[].person->name
}

The [] without an index tells GROQ to iterate over every element in the array.

Here are some common patterns for working with arrays according to the GROQ query cheat sheet:

Return all items with projections:

*[_type == 'movie']{
  title,
  'cast': castMembers[]{
    characterName,
    'actorName': person->name
  }
}

Filter array elements:

*[_type == 'movie']{
  title,
  'leadActors': castMembers[featured == true]{
    characterName,
    person->name
  }
}

Get all referenced documents:

*[_type == 'book']{
  title,
  authors[]->{
    name,
    bio
  }
}

The [] operator is the key - it tells GROQ to process every element in the array rather than just selecting a single one with [0], [1], etc.

If you're getting just one element, you likely have an array index like [0] somewhere in your query. Simply remove the index and use [] instead to get all elements!