ORMLite不能在Android的

創建獨特的組合行這是我定義的表中的字段：ORMLite不能在Android的

@DatabaseField(uniqueCombo = true, columnName = COLUMN_NAME_FEED_PROVIDER_TYPE, canBeNull = false) 
private int mFeedProviderType; 
@DatabaseField(uniqueCombo = true, columnName = COLUMN_NAME_FEED_PROVIDER_SUB_TYPE) 
private String mSubType; 
@DatabaseField(columnName = COLUMN_NAME_DATE, canBeNull = false) 
private long mDate;

我已經成功地加1行。但是，當我嘗試添加第二行這次改變mSubType字符串字段，它拋出和情況除外：

at com.j256.ormlite.misc.SqlExceptionUtil.create(SqlExceptionUtil.java:22) 
at com.j256.ormlite.stmt.mapped.MappedCreate.insert(MappedCreate.java:135) 
at com.j256.ormlite.stmt.StatementExecutor.create(StatementExecutor.java:450) 
at com.j256.ormlite.dao.BaseDaoImpl.create(BaseDaoImpl.java:310) 
at android.app.Activity.performCreate(Activity.java:5104) 
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144) 
at com.j256.ormlite.misc.SqlExceptionUtil.create(SqlExceptionUtil.java:22) 
at com.j256.ormlite.android.AndroidDatabaseConnection.insert(AndroidDatabaseConnection.java:169) 
at com.j256.ormlite.stmt.mapped.MappedCreate.insert(MappedCreate.java:91) 
at com.j256.ormlite.android.AndroidDatabaseConnection.insert(AndroidDatabaseConnection.java:155)

來源

2014-09-30 JY2k

即使你使用uniqueCombo，你需要一個id也。所以添加註釋generatedId像這樣：

@DatabaseField(generatedId = true) 
private int _id;//主鍵id

來源

2017-05-31 01:09:29

歡迎來到SO。請閱讀此[如何回答]（http://stackoverflow.com/help/how-to-answer）以提供高質量的答案。 – thewaywewere 2017-05-31 01:29:20

ORMLite不能在Android的

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