Question

In my application i need to query core data, i have a table which contains a field that stores a json string. Now i need to query this table for the any entry that has a specific key-value pair inside this field. I already tried to solve this with a LIKE expression but since the WILDCARDS DO MATCH THE NEWLINE this wasn’t going so well. Now im stuck at figuring out which regex i have to use with the MATCHES operation.

the key and a substring of the value are known and i just need to find the entry containing them,nothing else 🙂

Answer 1

solved it with regex:

    for(NSString* value in values)
{
    if(value.length > 0)
    {
        if(i > 0)
        {
            [query appendString:@" OR "];

        }
        [query appendFormat:@" (json_data MATCHES[c] '.*?\"%@\\\":\\\"([^\"]*)%@([^\"]*)\".*?')",key,value];
        i++;
    }

}