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core-datanspredicate

NSPredicate: Combine CONTAINS with IN

I have a set of users in CoreData and an search field in my application. User has the properties firstname and name.

Currently I have a predicate like "user.name CONTAINS[c] %@ OR user.firstname CONTAINS[c] %@ "

This works until the user types a full name like "john smith". Even if he types "john sm" the John Smith-Object should be found.

What is the predicate to combine an array (IN) of search terms with CONTAINS?

Solution

  • 2.5 years later I can answer my question with a bit more complex example in swift:

    var predicateList = [NSPredicate]()

let words = filterText.componentsSeparatedByString(" ")

for word in words{

     if count(word)==0{
           continue
     }

     let firstNamePredicate = NSPredicate(format: "firstName contains[c] %@", word)
     let lastNamePredicate = NSPredicate(format: "lastName contains[c] %@", word)
     let departmentPredicate = NSPredicate(format: "department contains[c] %@", word)
     let jobTitlePredicate = NSPredicate(format: "jobTitle contains[c] %@", word)

     let orCompoundPredicate = NSCompoundPredicate(type: NSCompoundPredicateType.OrPredicateType, subpredicates: [firstNamePredicate, lastNamePredicate,departmentPredicate,jobTitlePredicate])

     predicateList.append(orCompoundPredicate)
}

request.predicate = NSCompoundPredicate(type: NSCompoundPredicateType.AndPredicateType, subpredicates: predicateList)