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In Mongoose, what would I use .pre() middleware function for?

原文 2021-12-09 00:05:45 2 1 javascript/ mongodb/ express/ mongoose

I am just wondering what mongoose.pre('validate') and.pre('save') would be used for. I know how it works and what it does, but I am not sure what situation I could have that I would use it for. Couldn't I just do everything I need within code? And what is difference between validate and save?

Sorry if these are dumb questions, I've done my research but not sure when to use these features

1 answers

We use the.pre() function that is executed before or after a certain action that you specify. When you want to run a function every time before you save a document in the DB, we would you a pre-hook for that.

Example: Before saving a user to the database, you could call a function that would log the user into to a logging service.

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In Mongoose, what would I use .pre() middleware function for?

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solution1 0 2021-12-09 01:32:44

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0 2021-12-09 01:32:44