Question 193854 in Firebase Question posted in
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Firebase – FireStore: Update Anomaly

I have a scenario where each user in my Firebase database can have their own set of recipes, and they can also add recipes from other users to their fav_recipes. Now, I have made changes to an attribute of one of the recipes (For example I change name of recipe), and I need to update all the user’s fav_recipes (with updated name) that include this specific recipe. Here is my firestore schema.

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How can I efficiently achieve this in my Firebase database using Swift?

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2

Answers


  1. 0

    There’s no specific built-in operation to perform such a bulk update. You will have to:

    1. Perform a query to get the affected documents
    2. Loop over the results
    3. Update each document in turn
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  2. 0

    Single source of truth! You should only have to update in 1 spot.

    You shouldn’t have several copies of the same thing you can use DocumentReference to link favorites to the actual recipe.

    fav_recipes: [DocumentReference]

    or something like

    fav_recipes: [Recipe.ID]

    So you can query the recipe using an ID that does not change.

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