Comments on: Core Data Tutorial: How To Preload/Import Existing Data

By: Michael

Michael — Sun, 19 Dec 2010 05:27:30 +0000

I just noticed your schema shows:
“CREATE TABLE ZFAILEDBANKINFO ( Z_PK INTEGER PRIMARY KEY, Z_ENT INTEGER,
Z_OPT INTEGER, ZDETAILS INTEGER, ZNAME VARCHAR, ZSTATE VARCHAR,
ZCITY VARCHAR );”

Whereas mine shows:
“CREATE TABLE ZFAILEDBANKINFO ( Z_PK INTEGER PRIMARY KEY, Z_ENT INTEGER, Z_OPT INTEGER, ZDETAILS INTEGER, ZCITY VARCHAR, ZNAME VARCHAR, ZSTATE VARCHAR );”

I wonder why?

By: Michael

Michael — Sun, 19 Dec 2010 05:15:18 +0000

Ray,

I just want to post here an error on my part in case anyone ran into the same difficulty. I noticed that when I ran the project after following your tutorial I got the state showing up in the title of the cell where the name of the bank should be and the bank name and city where the city and state should be.

I looked at the data on the command line sqlite utility and got the same output as yours, “1|2|1|1|Desert Hills Bank|AZ|Phoenix” but looked at it in the firefox plugin and found that Z_CITY has the bank name and Z_NAME has the state abbreviation.

The data in banklist.sqlite3 seems correct, the structure is 0=id, 1=name, 2=city, 3=state, 4=zip, 5=close_date, 6=updated_date. However, FailedBanksCD.sqlite has this structure; 0=Z_PK, 1=Z_ENT, 2=Z_OPT, 3=ZDetails, 4=ZCITY, 5=ZNAME, 6=ZSTATE.

I used your python script verbatim… any idea how these got switched around and how I can set it to rights.

Thanks for all your work on these tutorials. PayPal donation on it’s way (come on folks.. show Ray how much you appreciate his work).

By: Christopher Pickslay

Christopher Pickslay — Tue, 16 Nov 2010 20:14:53 +0000

Ray-

Great tutorial! You saved me a ton of time.

By: Ray Wenderlich

Ray Wenderlich — Sun, 10 Oct 2010 22:39:44 +0000

@Piyush: I have a tutorial on how to read and write XML here:

http://www.raywenderlich.com/725/how-to-read-and-write-xml-documents-with-gdataxml

By: Piyush

Piyush — Thu, 07 Oct 2010 05:40:47 +0000

Hi ray,

Can u help me …I wanna wired in a core data to XML conversion… that means i would like to create xml file programmatically according to my core data for the back up and restore purpose. But i dont know the right way for write xml and read xml … please guide me or if possible than send a small sample code which help to me…

thanks in advance.

By: Ray Wenderlich

Ray Wenderlich — Wed, 06 Oct 2010 16:19:25 +0000

@Andrew: If you’re not seeing it as a choice, make sure that you have your xcdatamodel selected before you go to File\New File. If you’re still having warnings, what are they?

@Jeffrey: Thanks! According to this post, Z_OPT is the number of changes made to the data:

http://ablogontech.wordpress.com/2009/07/13/using-a-pre-populated-sqlite-database-with-core-data-on-iphone-os-3-0/

By: Jeffrey

Jeffrey — Mon, 04 Oct 2010 16:23:40 +0000

Ray,

Thank you very much creating for these tutorials — I’ve gone through the whole series and they are very helpful.

Question: Do you know what Z_OPT is?