mvc+ef+oracle环境中报错：ORA-00001: 违反唯一约束条件

分析原因：

在oracle中，主健不能自动生成，不过可以通过“序列”来实现，如果是这样的话，问题很可能就出在“序列”上了；

ORACLE表主键ID突然从已经存在的ID值开始自动生成，导致违反主键唯一性约束；

先上个触发器：

TRIGGER LESEIL."RIGHT"
BEFORE INSERT ON LESEIL."RIGHT" FOR EACH ROW
DECLARE last_Sequence NUMBER;
    last_InsertID NUMBER;
BEGIN
    IF (:NEW."RIGHTID" IS NULL) THEN
        SELECT "Seq_RIGHTID".NEXTVAL INTO :NEW."RIGHTID" FROM DUAL;
    ELSE
        SELECT Last_Number- INTO last_Sequence FROM User_Sequences WHERE UPPER(Sequence_Name) = UPPER('Seq_RIGHTID');
        SELECT :NEW."RIGHTID" INTO last_InsertID FROM DUAL;
        WHILE (last_InsertID > last_Sequence) LOOP
            SELECT "Seq_RIGHTID".NEXTVAL INTO last_Sequence FROM DUAL;
        END LOOP;
    END IF;
END;

解决办法：

待解决！