MongoDB for Developers with Python Transcripts
Chapter: Mapping classes to MongoDB with the ODM MongoEngine
Lecture: Concept: Inserting objects with mongoengine
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We saw that inserting in MognoEngine is super super straightforward, it's really delightful, so here we're going to create a car, but remember
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the car requires an engine, the engine is required and the engine must be an instance of an engine object. So we're first going to create an engine,
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set things like the horsepower, the liters, is the miles per gallon, so notice this is a chevy bolt which is an electric car
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so we just ramp the mile for gallon like super high, liters is zero because how many does an electric engine have- none,
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and I'll say it's a 120 horsepower, I really have no idea. Then we're going to create the car, its model is a bolt, its make is a chevy
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and the year is 2017, and then we just pass the engine along, right engine = engine, one is a keyword value and one is just the name of the variable.
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So then we have our car, and right now the id of the car is not stored in the database,
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so we hit save and boom, now we have like a car with its id and its default values set all of those things stored in the database.
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So this is great for inserting one car but if you are going to insert a thousand or a hundred thousand or a million cars
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let me tell you, this is the slowness right here, you do not want to do this; there's a much better way, maybe you don't take a million inserts at once
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maybe you bulk it up and do like 50 at a time or a 100 at a time, but if you are going to do some kind of bulk insert how do you do that?
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Also super easy, let's suppose we have a list of cars that we want to insert
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and I'm not showing how you initialize the cars, but same as above basically, but skip the save step, so we're going to get car one, car two,
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we want to insert a bunch of them we just go car.objects.insert and give it that list and boom it does a bulk insert in MongoDB,
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which if you're inserting many items is much much faster.