FOCUS: One-to-many Relationships
NoSQL databases, unlike SQL databases like PostgreSQL, MYSQL etc, which are traditionally built for ...
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Oh, this is a wonderful explanation. Thank you for spending time to make justice to this subject. I was researching ways of handling data modeling effectively in mongoDb and behold I landed In this, and it has cleared the air.
is it possible to use mongoose schema post hooks to add relation?
What kind of relationship are you looking to add?
Hi, How can I remove the id and _id repeated from the last image?
link
new Schema({ ... }, { id: false });
Great article. I am about to implement relations for my MEAN project.
A Couple of questions.
Q-1. Can I have multiple path in find().populate() method?
I have a Log collection, I was thinking to add 4 ObjectId type fields. i.e. client, service, executive, manager - of course apart from its own fields. Each of these are just one object. i.e. One Log entry will be associated with one Client, Service, Execute and Manager.
So I will need to add multiple path with their own select keys. Is that recommended?
And when on frontend, when the Log is displayed, I am planning to populate relevant fields from all these 4 (i.e. Client Name, ClientCategory, ClientSubCategory, ClientRating), (ServiceName, ServiceFreq), ExecName and ManagerName.
The Log display on frontend has Search and filter options on various fields. So when a user searches or applies filters the backend Mongoose query will run again, fetch the data and display.
Q-2: What would be the performance impact if the number of entries in Log collection is in the range to 5000 - 50,000, when I use Child Ref vs Parent Ref? Which one is recommended according to you in this case.
Thanks again
hemant
This was a good tutorial.Goodjob!👍
Yes this is something clear , at last. It is the backend.
I would like to have the code and adjust it , to my front-end.
Thanks.
Thank you for this wonderfull explanation. Now i can implement my own relations for my express Web App.
Great post ....thanks for this.
Question: Please how can i fetch data from db using timestamps. Thanks
Nice write-up! You have done justice to the relationship options available to document-oriented DBs.
Easy to follow too.
Thank you, Kubiat.
This is very helpful, thank you!
Dude it's up to the mark. I just fall in love with your clear explanation. :)
Thank you.