CODEWITHSUNDEEP
iphoneobjective-ccore-datacsvnsarray
msec
msec

Reputation: 252

How do I load this array into Core Data Entity?

Hi I am struggling to figure out how to loop through the array below and add each row into my core data entity

Any help would be greatly appreciated 

//CREATE AN ARRAY FROM CSV DOCUMENT USING CHCSVPARSER
NSError *error;
NSString *customerCSV = [[NSBundle mainBundle] pathForResource:@"CUSTOMERS" ofType:@"csv"];
NSArray *importArray = [NSArray arrayWithContentsOfCSVFile:customerCSV encoding:NSUTF8StringEncoding error:&error];
NSLog(@"%@",importArray);

//LOOP THROUGH CREATED ARRAY AND ADD OBJECTS TO COREDATA CUSTOMER ENTITY
Invoice_MarketAppDelegate* delegate = [[UIApplication sharedApplication] delegate];
NSManagedObjectContext* managedObjectContext = delegate.managedObjectContext;
NSManagedObject* newCustomer;
newCustomer = [NSEntityDescription insertNewObjectForEntityForName:@"Customers" inManagedObjectContext:managedObjectContext];

I don't know what to do here.

for () {
    NSLog(@"importing Row");

}

Here is a log of the attributes I will be importing, provided at the command

 NSLog(@"%@",importArray);

since the csv included column names

(

    CONTACTNAME,
    PHONE,
    COMPANYNAME,
    NOTES
),

Upvotes: 2

Views: 1082

Answers (1)

shannoga
shannoga

Reputation: 19869

If all you have is 4 objects, don't bother looping you can simply -

If you have a sub class of Customers you can use:

 newCustomer.contactName = [importArray objectAtIndex:0];//change it to the correct index, and correct property name
 newCustomer.phone = [importArray objectAtIndex:1];
 //....And so on

else you will need to use

 [newCustomer objectForKey:@"contactName"] = [importArray objectAtIndex:0];

BUT

If you have many properties in your CSV you can set an other array of the keys in your entity and -

     for(NSUInteger i=0;i<[importArray count];i++){
       [newCustomer objectForKey:[keysArry objectAtIndex:i]] = [importArray objectAtIndex:i];  
     }

Better sometimes

A better way to handle this, ecpaciely if you have many properties is to use -

 //1. crate a dictionary from your CSV with keys that are similar to your entity property names.
 NSDictionary *csvDictinary = []//set your dictionary.
 //2.get all the property names from your customers entity
 NSDictionary *attributes = [[NSEntityDescription
                             entityForName:@"Costumer"
                             inManagedObjectContext:self] attributesByName];
//3. set the properties to your entity
for (NSString *attr in attributes) {
    [Costumer setValue:[csvDictinary valueForKey:attr] forKey:attr];
}

EDIT To sub class your entity:

  1. select the entity in the model editor.
  2. in Xcode menu select Editor -> Create NSManagedObject Subclass.
  3. import or @class your new subclass when you want to refer it.

BTW

  1. Subclass your entities - it will make your life easier and will cause better performance.
  2. Your entity name should be -"Customer" in singular, as it hold only 1 customer.

Upvotes: 4

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