ormlite

问题 I have a non null column defined with a default: @DatabaseField(dataType = DataType.TIME_STAMP, columnDefinition = "DATETIME DEFAULT CURRENT_TIMESTAMP NOT NULL") private Date createdDate; When trying to save a row with the createdDate field unset, I get the following error: [SQLITE_CONSTRAINT_NOTNULL] A NOT NULL constraint failed (NOT NULL constraint failed: ORMLite is probably trying to explicitly insert a NULL value into the field. Adding persisted = false to the annotation avoids this, but

问题 I am using a queryBuilder with a where to do a select. It’s a table of POJOs and in general has been working well for many users for a long period of time. ArrayList<X> result = new ArrayList<X>(); QueryBuilder<X, Integer> queryBuilder = getXDao().queryBuilder(); Where<X, Integer> where = queryBuilder.where(); where.eq(X, x); queryBuilder.orderBy(X, true); result = (ArrayList<X>)getXDao().query(queryBuilder.prepare()); There is one particular who crashes every time they query this table due

问题 I am loading a set of objects (and their foreign objects) using ormlite 4.35 on Android. It takes (in the emulator) between 16 and 19 seconds for the timing in the getAllCragsWithLocation() method below. There are 590 Crags in the database and 40 don't have a location. There are several lines logged such as 03-19 11:03:54.441: I/dalvikvm(1156): Jit: resizing JitTable from 1024 to 2048 03-19 11:03:55.531: D/dalvikvm(1156): GC_CONCURRENT freed 544K, 37% free 5174K/8199K, external 731K/1109K,

问题 I've got problem with my database. Application sends link written by user and in response get short form of the link (that works fine). In my database I need to put both versions of the link - full , and short one and here we have a problem. I got error like this : java.lang.IllegalStateException: Could not construct instance of helper class class pl.bartos.task.DatabaseHelper at com.j256.ormlite.android.apptools.OpenHelperManager.constructHelper(OpenHelperManager.java:222) at com.j256

问题 I'm using ORMLite 4.42 for an Android app. I have an entity wich has foreign fields. These fields have foreign fields too. The problem is that when i get an element of the root entity, only the first level of foreign fields are loaded. The others levels are null. On the database every seems ok. The id is correct. Any help? Edit with models . The Equipment model is always null qhen I query by ID. But if I query the whole table, then it gives me access to everything. TABLE INCIDENT

问题 It is possible to save the data from a table before my model changes the database? For example i rename a column and will not lose the data. So i.e. i want to fetch all data from column c1, rename my column to c2 and write all data back. 回答1: i want to fetch all data from column c1, rename my column to c2 and write all data back. Sqlite does not support the renaming of columns so this will not work under Android. You can certainly add an additional column however. There is some good

问题 Is it possible with OrmLite to create a sql script file to easily populate the database with data? I did some searching and couldn't come up with anything easy. I know I can create some objects with data, I'm just looking for a cleaner method. I'm thinking create a script file, open a a reader at load, and process each file as raw SQL the executeRaw() method. Any thoughts? 回答1: Good one Joe. I think your idea of the executeRaw() is close but use updateRaw() instead. Update handles INSERT ,

问题 I'm using ormlite for Android and I'm trying to get a multiple column unique-constraint. As of now i'm only able to get a unique constraint on indiviudal columns like this: CREATE TABLE `store_group_item` (`store_group_id` INTEGER NOT NULL UNIQUE , `store_item_id` INTEGER NOT NULL UNIQUE , `_id` INTEGER PRIMARY KEY AUTOINCREMENT ); and what I want is CREATE TABLE `store_group_item` (`store_group_id` INTEGER NOT NULL , `store_item_id` INTEGER NOT NULL , `_id` INTEGER PRIMARY KEY AUTOINCREMENT,

问题 First of I am new to ORMLite. I would like my model class to have a field which is a list of strings, that would eventually hold a list of tags for my model object. Which ORMLite annotations should I use? Firstly I don't want to have a table of all tags, and then use the @ForeignCollectionField . Also I thought of using the @DatabaseField(dataType=DataType.SERIALIZABLE) annotation, but it turns out that List<String> doesn't implement the Serializable interface. What are your suggestions? 回答1:

问题 I am using ormlite in my recent android project. I want to order by on a query on multiple columns in a table (say two columns). How can I achieve that?? Here is the code for a single order by... QueryBuilder<Visit, Integer> qb = getHelper().getVisitDao().queryBuilder(); qb.where().eq("FOREIGN_ID", id); qb.orderBy("VISIT_DATE", false); 回答1: I want to order by on a query on multiple columns in a table(say two columns). How can i achieve that?? All you need to do is to call orderBy(...)