我使用Oracle数据库存储有关课程的信息
我有public class CountingFileRequestBody extends RequestBody {
private static final String TAG = "CountingFileRequestBody";
private final ProgressListener listener;
private final String key;
private final MultipartBody multipartBody;
protected CountingSink mCountingSink;
public CountingFileRequestBody(MultipartBody multipartBody,
String key,
ProgressListener listener) {
this.multipartBody = multipartBody;
this.listener = listener;
this.key = key;
}
@Override
public long contentLength() throws IOException {
return multipartBody.contentLength();
}
@Override
public MediaType contentType() {
return multipartBody.contentType();
}
@Override
public void writeTo(BufferedSink sink) throws IOException {
mCountingSink = new CountingSink(sink);
BufferedSink bufferedSink = Okio.buffer(mCountingSink);
multipartBody.writeTo(bufferedSink);
bufferedSink.flush();
}
public interface ProgressListener {
void transferred(String key, int num);
}
protected final class CountingSink extends ForwardingSink {
private long bytesWritten = 0;
public CountingSink(Sink delegate) {
super(delegate);
}
@Override
public void write(Buffer source, long byteCount) throws IOException {
bytesWritten += byteCount;
listener.transferred(key, (int) (100F * bytesWritten / contentLength()));
super.write(source, byteCount);
delegate().flush(); // I have added this line to manually flush the sink
}
}
}
模型
Course每门课程的描述长度超过4000
所以我被迫将class Course < Sequel::Model
set_dataset Sequel.lit(TABLE_NAME_HERE)
set_primary_key :offer_rk
end
列的类型设置为description。
在我的代码中，我有类似
的内容Clob不幸的是它会引发错误
course.update description: large_text_here
似乎Sequel将描述保存为普通OCIError: ORA-01704: string literal too long
而不是String值。
如何正确保存Clob字段中的大型文字？
我应该以某种方式修补此方法吗？
Clob谢谢。
答案 0 :(得分：1)
尝试使用prepared_statements插件：Course.plugin :prepared_statements