Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
I want to store certain items in the database with variable amount of properties.
For example:
An item can have ‘url’ and ‘pdf’ property both others do not en instead have ‘image’ and ‘location’ properties.
So the problem is an some items can have some properties and others a lot.
How would you design this database. How to make it searchable and performant?
What would the schema look like?
Thanks!
What you are after has a name – Entity Attribute Value (EAV). It is ‘a data model that is used in circumstances where the number of attributes (properties, parameters) that can be used to describe a thing (an ‘entity’ or ‘object’) is potentially very vast, but the number that will actually apply to a given entity is relatively modest.’