What could be causing Firestore to round numbers with more than 16 digits?

I am encountering an issue while attempting to save a 20-digit number from my Vue app into my Firestore database. The problem arises when it appears that the last 3 digits are being rounded off, and any numbers starting with a zero are having the zero removed from them. This issue seems to be prevalent with numbers exceeding 16 digits in length. For instance, when trying to save 12345678910111213141, it gets stored as: 12345678910111214000 upon checking the database. A similar dilemma was discussed in a previous question, where the correct number was retrieved in the program despite showing the rounded value in Firestore. However, in my case, even the app displays the rounded figure. How can this be resolved?

javascriptvue.jsgoogle-cloud-firestore

Answer №1

Similar to the previously mentioned question, when your number surpasses the limits set by JavaScript for number size (which is a signed 53 bit number), Firestore comes to the rescue with its capability to store numbers up to 64 bits. However, viewing or retrieving these large numbers in JavaScript can lead to data loss due to constraints in internal storage capacity. It's not about the number of digits, but rather the magnitude of the number in relation to the maximum number of bits available for storage.

Numbers that begin with zero will always lose their leading zeroes when saved in a numerical format. These leading zeroes don't hold significance in mathematical calculations, hence they are omitted from the representation. If preserving leading zeroes is necessary for display purposes, consider formatting the number as a string and adding padding zeroes before displaying it.

If retaining the exact formatting of a number without losing any details, or dealing with values larger than 64 bits, converting it into a string field instead of a number is recommended. However, this may limit the ability to perform precise mathematical comparisons in queries on the stored data.

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