ormlite

问题 I am using ormLite to store data on device. I can not understand why but when I store about 100 objects some of them stores too long time, up to second. Here is the code from DatabaseManager: public class DatabaseManager public void addSomeObject(SomeObject object) { try { getHelper().getSomeObjectDao().create(object); } catch (SQLException e) { e.printStackTrace(); } } } public class DatabaseHelper extends OrmLiteSqliteOpenHelper public Dao<SomeObject, Integer> getSomeObjectDao() { if (null

问题 I'm using ORMLite w/ Android. I want to grab the ID value of the object w/ the highest-valued ID. I'd also like to generalize this to requesting a single object w/ max/min value for any arbitrary field. What is the best practice for doing this? I realize I could execute a raw query, but is there any other way that jumps out at anyone? I'm imagining something similar to Predicates when executing FetchRequests in CoreData on iOS. 回答1: Your answer looks good @Ben but I thought I'd give some

问题 i want to create an inner join on three tables like this one for example: SELECT C.Description, D.ItemDescription FROM OrderDetailStatement AS D INNER JOIN OrderHeaderStatement AS H ON H.OrderHeaderStatementRefID = D.OrderHeaderStatementRefID INNER JOIN customers AS C ON H.CustomerRefID = C.CustomerRefID WHERE (D.MixedValue > 1000) but i'm a little bit confused, could you please provide me a walkthrough? thanks in advance 回答1: ORMLite now supports simple JOIN statements. You can do something

问题 I want to implement an ActionBar Search Widget with suggestions ability. I already have a string array stored in my ORMLite database that I want to use for the suggestions. How can I do this without creating loads of classes (Provider, Searchable...!)? 回答1: It's a sample, I hope it can help you. To implements more features in this cursor, eg. open activity when press in suggestion item, take a look on this http://developer.android.com/guide/topics/search/adding-custom-suggestions.html package

问题 When working on Android, does ORMLite only save shallow level objects? I have a data structure with nested Objects, both of which are newly created, and I would like to be able to save both of them with one call to dao.create() For exmaple, I have the following Parent Class. @DatabaseTable public class Parent { @DatabaseField(generatedId=true) public int id; @DatabaseField public String name; @DatabaseField public Child child; } and the following Child Class. @DatabaseTable public class Child

问题 Is there any way, how to get Cursor for a query, which I am processing with ORMLite Dao object? 回答1: ORMLite now supports next() , previous() , moveRelative(offset) , ... methods on the CloseableIterator class. This should allow you to move the underlying Cursor object around at will. It also supports the following DAO Cursor methods: dao.mapSelectStarRow(databaseResults) Return the latest row from the database results from a query to select * . With this you can change the cursor location

问题 I'm working on updates on an object, when I create it the xml was successefuly stored: DatabaseHelper db = new DatabaseHelper(getActivity()); Dao<Demandes, Integer> demandesDao = null; try { demandesDao = db.getDemandesDao(); Demandes maDemande = new Demandes(xml, 0, null, 0, "", 0, null); demandesDao.create(maDemande); demandeId = maDemande.getId(); xml = xml.replace("<IdContactClient></IdContactClient>", "<IdContactClient>" + demandeId + "</IdContactClient>"); System.out.println(xml);

问题 I'm using Eclipse Helios on Win 7 platform. I have this Dao class package com.example.hello; import com.j256.ormlite.field.DatabaseField; import com.j256.ormlite.table.DatabaseTable; @DatabaseTable(tableName = "accounts") public class Account { // for QueryBuilder to be able to find the fields public static final String NAME_FIELD_NAME = "name"; public static final String PASSWORD_FIELD_NAME = "passwd"; @DatabaseField(generatedId = true) private int id; @DatabaseField(columnName = NAME_FIELD

问题 How can we rename column name in ORMLite? I am trying to write that query SELECT id as _id from some_table Android Cursor Adapter requires us to have column named _id and ORMLite requires us to have column named id . I am trying to write that query and return Cursor from this query. Dao<NewsArticle, Long> newsArticleDao = ((SomeApp)mContext.getApplicationContext()).getDAOConnection().getDAO( NewsArticle.class); QueryBuilder<NewsArticle, Long> query = newsArticleDao.queryBuilder().selectRaw( "

问题 I have the following object that is a self-relationship, as follows: @DatabaseTable(tableName = "categoria") public class Categoria implements Serializable { @DatabaseField(generatedId = true) public int id; @DatabaseField(canBeNull = true, foreign = true) public Categoria pai; @DatabaseField(canBeNull = false, width = 50, unique = true) public String descricao; public Categoria() { } } When I do this: Categoria cat = new Categoria(); cat.pai = null; cat.descricao = "Comidas"; categoryDao