FMDB Query with dictionary - objective-c

Question

I need to run a query that looks would look like
INSERT INTO Appointments (field1, field2, field3, ..., field30) VALUES (value1, value2, value3, ..., value30)
I have my Appointments being stored inside a Dictionary and would like to loop through that dictionary to make the keys equal the fields and the values equal the values.
I'm trying to use the executeUpdate:... withParameterDictionary:... but can't figure out how to make that work with multiple fields if I don't know the field names. The field names are being sent via JSON and instead of manually typing out 30 fields I would just like to loop through the dictionary and get them that way.
I have even tried
NSMutableArray *keys = nil;
NSMutableArray *values = nil;
for (NSDictionary *dict in [json objectForKey:#"data"]) {
keys = [NSMutableArray array];
values = [NSMutableArray array];
for (id key in dict) {
[keys addObject:key];
[values addObject:[NSString stringWithFormat:#":%#", key]];
}
NSString *keyString = [keys componentsJoinedByString:#","];
NSString *valueString = [values componentsJoinedByString:#","];
[[dataObj db] executeUpdate:#"DELETE FROM Appointments"];
NSLog(#"INSERT INTO Appointments (%#) VALUES (%#)", keyString, valueString);
[[dataObj db] executeUpdate:#"INSERT INTO Appointments (?) VALUES (?)", keyString, valueString];
}
The code above prints the NSLog how the query should looks but nothing is being inserted into the database. I know this because I am opening the simulator database file after the queries run and it is still blank.
How can I get the above code to work or how can I get the executeQuery:... withParameterDictionary:... to work with multiple names.

Answer 1

I ran a couple of quick tests, and this works for me:
NSDictionary* dict = [NSDictionary dictionaryWithObjectsAndKeys:#"AAAA44", #"a", #"BBBB44", #"b", #"CCCC44", #"c", nil];
NSMutableArray* cols = [[NSMutableArray alloc] init];
NSMutableArray* vals = [[NSMutableArray alloc] init];
for (id key in dict) {
[cols addObject:key];
[vals addObject:[dict objectForKey:key]];
}
NSMutableArray* newCols = [[NSMutableArray alloc] init];
NSMutableArray* newVals = [[NSMutableArray alloc] init];
for (int i = 0; i<[cols count]; i++) {
[newCols addObject:[NSString stringWithFormat:#"'%#'", [cols objectAtIndex:i]]];
[newVals addObject:[NSString stringWithFormat:#"'%#'", [vals objectAtIndex:i]]];
}
NSString* sql = [NSString stringWithFormat:#"insert into test (%#) values (%#)", [newCols componentsJoinedByString:#", "], [newVals componentsJoinedByString:#", "]];
NSLog(#"%#", sql);
BOOL updateSuccess = [db executeUpdate:sql];
The trick is to add ' to the data in the arrays.

Answer 2

NSDictionary *argsDict
= [NSDictionary dictionaryWithObjectsAndKeys:#"My Name",
#"name", nil];
[db executeUpdate:#"INSERT INTO myTable (name) VALUES (:name)"
withParameterDictionary:argsDict];

Answer 3

Here is some sample code I just wrote to support optional values at insert time. Just briefly tested but I think it works.
NSMutableDictionary* fieldsandvalues = [NSMutableDictionary dictionary];
fieldsandvalues[#"word"] = userphrase.word;
fieldsandvalues[#"translation"] = userphrase.translation;
if (userphrase.samplesentence.length > 0) {
fieldsandvalues[#"samplesentence"] = userphrase.samplesentence;
}
if (userphrase.notes.length > 0) {
fieldsandvalues[#"notes"] = userphrase.notes;
}
NSMutableArray* keyswithcolon = [NSMutableArray array];
for (NSString* key in fieldsandvalues.allKeys) {
[keyswithcolon addObject:[NSString stringWithFormat:#":%#", key]];
}
NSString* sql = [NSString stringWithFormat:#"INSERT INTO userphrase (%#) VALUES (%#)", [fieldsandvalues.allKeys componentsJoinedByString:#","], [keyswithcolon componentsJoinedByString:#","]];
// DLog(#"sql: %#", sql);
if (![self.db executeUpdate:sql withParameterDictionary:fieldsandvalues]) {
NSAssert(NO, #"Failed inserting userphrase into database! Last error: %# - %#", self.db.lastError, self.db.lastErrorMessage);
return nil;
}