java - SqlDelight 不为 SQL 语句生成 SQL 查询字符串

Question

在 SqlDelight documentation 中的示例中，SqlDelight 从 HockeyPlayer.sq 文件生成的 HockeyPlayerModel 在抽象类中实现 public 抽象类 HockeyPlayer 实现 HockeyPlayerModel

在此类中，字符串 SELECT_ALL_INFO 作为查询传入 db.rawQuery(SELECT_ALL_INFO, new String[0])。字符串 SELECT_ALL_INFO 是由 HockeyPlayer.sq 内的 select_all_info 语句生成的。但是，在我的情况下，我的语句不会生成字符串。这是为什么？

我的声明

names_for_groups:
SELECT DISTINCT name, exercise_set_group FROM exercise_set JOIN exercises
USING (exercise_id) WHERE workout_FK = ? ORDER BY exercise_set_group ASC ;

我对 SqlDelight 生成的 ExerciseSetModel 的实现

@AutoValue
public abstract class DbExerciseSet implements ExerciseSetModel, DbItem {
    public static final Factory<DbExerciseSet> FACTORY = new Factory<>(AutoValue_DbExerciseSet::new);
    public static final RowMapper<DbExerciseSet> MAPPER = FACTORY.select_allMapper();

    public static final RowMapper<NamesForGroups> NAMES_FOR_GROUPS_MAPPER =
            FACTORY.names_for_groupsMapper(AutoValue_DbExerciseSet_NamesForGroups::new);

    public List<NamesForGroups> namesForGroups(SQLiteDatabase db) {
        List<NamesForGroups> namesForGroupsList= new ArrayList<>();
        Cursor cursor = db.rawQuery(NAMES_FOR_GROUPS, new String[0]);
            while (cursor.moveToNext() && NAMES_FOR_GROUPS_MAPPER.map(cursor) != null) {
                //NamesForGroups namesForGroups = NAMES_FOR_GROUPS_MAPPER.map(cursor);
                namesForGroupsList.add(NAMES_FOR_GROUPS_MAPPER.map(cursor));
            }

        return namesForGroupsList;
    }

    @AutoValue
    public abstract static class NamesForGroups implements Names_for_groupsModel {}

    @AutoValue
    public abstract static class Exercises implements ExerciseModel {}
}

需要明确的是，在 db.rawQuery(NAMES_FOR_GROUPS, new String[0]) 行中找不到变量引用 NAMES_FOR_GROUPS

Answer 1

文档需要更新，我会更新。我们不再在 SQLDelight 0.6.+ 中生成字符串，而是工厂中有一个方法返回用于查询的 SQLDelightStatement:

public List<NamesForGroups> namesForGroups(SQLiteDatabase db) {
    List<NamesForGroups> namesForGroupsList= new ArrayList<>();
    SQLDelightStatement query = FACTORY.name_for_groups();
    Cursor cursor = db.rawQuery(query.statement, query.args);
        while (cursor.moveToNext() && NAMES_FOR_GROUPS_MAPPER.map(cursor) != null) {
            //NamesForGroups namesForGroups = NAMES_FOR_GROUPS_MAPPER.map(cursor);
            namesForGroupsList.add(NAMES_FOR_GROUPS_MAPPER.map(cursor));
        }

    return namesForGroupsList;
}