Examples with Child org.xutils.sample.db.Child used on opensource projects

Example 1 with Child

use of org.xutils.sample.db.Child in project xUtils3 by wyouflf.

the class DbFragment method onTestDbClick.

@Event(R.id.btn_test_db)
private void onTestDbClick(View view) {
    // 一对多: (本示例的代码)
    // 自己在多的一方(child)保存另一方的(parentId), 查找的时候用parentId查parent或child.
    // 一对一:
    // 在任何一边保存另一边的Id并加上唯一属性: @Column(name = "parentId", property = "UNIQUE")
    // 多对多:
    // 再建一个关联表, 保存两边的id. 查询分两步: 先查关联表得到id, 再查对应表的属性.
    String temp = "";
    try {
        DbManager db = x.getDb(daoConfig);
        Child child = new Child();
        child.setName("child's name");
        Parent test = db.selector(Parent.class).where("id", "in", new int[] { 1, 3, 6 }).findFirst();
        // Parent test = db.selector(Parent.class).where("id", "between", new String[]{"1", "5"}).findFirst();
        if (test != null) {
            child.setParentId(test.getId());
            temp += "first parent:" + test + "\n";
            tv_db_result.setText(temp);
        }
        Parent parent = new Parent();
        parent.name = "测试" + System.currentTimeMillis();
        parent.setAdmin(true);
        parent.setEmail("wyouflf@qq.com");
        parent.setTime(new Date());
        parent.setDate(new java.sql.Date(new Date().getTime()));
        //db.save(parent);
        db.saveBindingId(parent);
        //保存对象关联数据库生成的id
        db.saveBindingId(child);
        List<Child> children = db.selector(Child.class).findAll();
        temp += "children size:" + children.size() + "\n";
        tv_db_result.setText(temp);
        if (children.size() > 0) {
            temp += "last children:" + children.get(children.size() - 1) + "\n";
            tv_db_result.setText(temp);
        }
        Calendar calendar = Calendar.getInstance();
        calendar.add(Calendar.DATE, -1);
        calendar.add(Calendar.HOUR, 3);
        List<Parent> list = db.selector(Parent.class).where("id", "<", 54).and("time", ">", calendar.getTime()).orderBy("id").limit(10).findAll();
        temp += "find parent size:" + list.size() + "\n";
        tv_db_result.setText(temp);
        if (list.size() > 0) {
            temp += "last parent:" + list.get(list.size() - 1) + "\n";
            tv_db_result.setText(temp);
        }
        // test update
        parent.name = "hahaha123";
        parent.setEmail("wyouflf@gmail.com");
        db.update(parent);
        db.update(parent, "name", "email");
        db.update(Parent.class, WhereBuilder.b("id", "=", 1).and("isAdmin", "=", true), new KeyValue("name", "test_name"), new KeyValue("isAdmin", false));
        Parent entity = child.getParent(db);
        temp += "find by id:" + entity.toString() + "\n";
        tv_db_result.setText(temp);
        List<DbModel> dbModels = db.selector(Parent.class).groupBy("name").select("name", "count(name) as count").findAll();
        temp += "group by result:" + dbModels.get(0).getDataMap() + "\n";
        tv_db_result.setText(temp);
    } catch (Throwable e) {
        temp += "error :" + e.getMessage() + "\n";
        tv_db_result.setText(temp);
    }
}