save

Say I have a model called Transaction which has a :transaction_code attribute. I want that attribute to be automatically filled with a sequence number which may differ from id (e.g. Transaction with id=1 could have transaction_code=1000 ). I have tried to create a sequence on postgres and then making the default value for the transaction_code column the nextval of that sequence. The thing is, if I do not assign any value to @transaction.transaction_code on RoR, when I issue a @transaction.save on RoR, it tries to do the following SQL: INSERT INTO transactions (transaction_code) VALUES (NULL);

Possible Duplicate: Android Camera - Save image into a new folder in SD Card i'm trying to take picture and save it to a file. The problem cames i'm trying to save the bitmap to a file. Here is my code: private void takePic() { Intent cameraIntent = new Intent( android.provider.MediaStore.ACTION_IMAGE_CAPTURE); startActivityForResult(cameraIntent, 2); } public void onActivityResult(int requestCode, int resultCode, Intent data) { if (requestCode == 2) { Bitmap photo = (Bitmap) data.getExtras().get("data"); ImageView test = (ImageView) findViewById(R.id.test); test.setImageBitmap(photo); try {

I'm a Java and C# developer, and, I admit, I'm not that good in PHP. I need to store an object in an application scope that lives as long as the app itself is running. I can't save it in the Session, because it expires, also I can't serialize it to disk. Is there something like a C# Application object in PHP? Theodore R. Smith 2018 Edit: Time has not been kind to APC, especially since PHP 7 includes bundled support for Zend Optimizer+, which does largely the same thing (except the key-store). These days, the key store aspect has been forked over into the APCu project . However, in 2018, the

How can I save/load full embedded h2 in-memory database to some file or directory in binary mode for faster loading. I want to use this for caching data so I don't have to run all the lines of create table/insert clauses every time. Thomas Mueller Instead of using an in-memory database, you could use a regular (persisted) database. You can still use in-memory tables even then (create memory table). The easiest way to persist a completely in-memory database to disk is to use the SCRIPT TO 'fileName' SQL statement. This will create an SQL script. The data is stored in text form, which doesn't

Imagine an CoreData entity (e.g. named searchEngine ). NSManagedObjectContext manages some "instances" of this entity. The end-user is going to be able to select his "standard searchEngine" with a NSPopupButton . The selected object of NSPopupButton should be binded to the NSUserDefaults. The problem: 1) @try{save} a) If you try to save the selected "instance" directly to NSUserDefaults there comes something like this: -[NSUserDefaults setObject:forKey:]: Attempt to insert non-property value ' (entity: searchEngine; id: 0x156f60 ; data: { url = " http://google.de/ "; someAttribute = 1; name =

I know there is probably an answer already to this question but I haven't been able to find it yet and there is a deadline on my project. So I have made an html5 canvas and I would like to be able to do two things with one(or more) buttons. I would like the user to be able to save what he has just done by clicking on the save button and ideally I would like the image to be downloaded (as opposed to having to right click and "Save image as". This is what I have been able to do so far). I would also like the image to be saved (maybe to a database? or a server? I don't know how it works) so that