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so in the above the “platform” value looks something like value1;value2;value3; I need to only grab the value2 and count it vs the whole platform string. any easy way here to do that? i cant use split in a queryset, not sure how to go about it here.
Please provide an example if possible.
You could probably build an expression using the
StrIndex database functions.
But, what I would really recommend is that if this is going to be a common operation, you would refactor your database to extract that data into separate fields - or possibly even a related model, and perform the data manipulations when the data is being inserted into the table.
great can you give me a example making some assumptions. that field can not be broken out, its a string field ; separated.
The examples of using those functions are in the docs.
Sure it can. How is this data getting entered into the database?
im looking for a hand with the existing data. and im looking for a hand in the form of an example. its a peer to peer blockchain database. spread out across 1000 nodes. So I have to deal with the data i have. If you can not assist with either I understand. Ill hope someone with those abilities can post.
I can assist, however, I’m not going to write your code for you. It’s up to you to give it a try to see what you can come up with. If you’re still having problems after you’ve made your attempt, I’ll be more than happy to help guide you through to a solution.
Thanks, yes i have tried already with no success… and only post in forums once i am totally stuck. hence my post here.
You’ve tried using those database functions?
Ok, so why don’t you post what you’ve tried, and we can move forward from there.
I have not, i do not understand how. hence an example for me to start from and learn from. I’m a visual learner with heavy ADHD reading is not the method i learn. if you don’t want to “write my code” write an example similar to what i am looking for, ill learn from it and write my own.
Again, the referenced docs show examples of using those functions.
thanks, i now understand why you have 10k+ posts with only 765 solutions. Figured i would try this forum again for help… but same person, same kind of “read the manual” response.
Assuming that the
platform field always contains a semicolon-separated string and you only want to count the occurrences of
value2 , you can use Django’s
When expressions within the
Count function to conditionally count instances of