我添加了一个新的表到我的DB:SQLite的ID字段 - 自动填充
CREATE TABLE myTable (
myId ID NOT NULL,
aNumber INTEGER NOT NULL,
anUniqueTextId TEXT NOT NULL,
aText TEXT,
PRIMARY KEY(myId, anUniqueTextId) ON CONFLICT IGNORE,
FOREIGN KEY(anUniqueTextId, aNumber) REFERENCES otherTable(otherTableId, otherTableValue2) ON DELETE CASCADE
);
现在我想无需手动找出哪些索引中插入值应我把myId
领域:
[myDatabase inTransaction:^(FMDatabase *db, BOOL *rollback) {
[db executeUpdate:@"INSERT INTO myTable VALUES(?,?,?)",
// @(myData.myId), //I don't want to insert it manually
@(aNumber),
myData.anUniqueTextId,
myData.aText];
if (db.lastErrorCode) {
NSLog(@"Huston, we've got a problem: %@", db.lastError.localizedDescription);
}
}];
OFC,我来到这里的错误说服力:
table myTable has 4 columns but 3 values were supplied
现在的问题是如何将数据插入到m ake这个字段autoinsert myId?我不确定我的插入代码是无效的还是CREATE TABLE语句。
- 更新 -
我更新的创建语句来纠正一个:
CREATE TABLE myTable (
myId INTEGER PRIMARY KEY DEFAULT 0 NOT NULL,
aNumber INTEGER NOT NULL,
anUniqueTextId TEXT NOT NULL,
aText TEXT,
FOREIGN KEY(anUniqueTextId, aNumber) REFERENCES otherTable(otherTableId, otherTableValue2) ON DELETE CASCADE
);
这不适用于FMDB,它在类中的某处崩溃。 – Hemang