auto-generate

Using sequence in MySQL and Hibernate

落爺英雄遲暮 提交于 2019-11-28 03:54:41
问题 I'm working on a project that uses Hibernate and MySQL. I intend to use sequence to generate ID for all tables in database. (It's hard to describe my question, so I will show you as an example). For example: I have 2 tables A & B. Firstly, I insert 10 records to table A, and their IDs will be 1 to 10 . Then, I insert 10 records to table B, and I want their IDs will be 11-20 , not 1-10. It means the generated ID value will be counted by all records in all tables in databases, not in a single

Automatically generate Date + 4-digit sequence number for ID in Access 2010+

耗尽温柔 提交于 2019-11-28 01:32:27
I need to automatically generate a 12 character value for my Business Key. Without any user interaction. 8 character -> Today Date (yyyymmdd or ddmmyyyy). + 4 character -> Sequential Number (0001,0002,0003). The Sequential Number must reset on each new day. Is it possible to do this in Microsoft Access 2010+ without any coding involved? Since you are using Access 2010+ the best way to accomplish your goal would be to use a Before Change data macro like this To create the Before Change macro, click the "Before Change" button on the "Table" tab of the ribbon when the table is open in Datasheet

Auto-generate an interface implementation in C#?

懵懂的女人 提交于 2019-11-27 22:04:13
问题 I know this is quite lazy but, is there any way on Visual C# 2010 Express to auto-generate an interface implementation? (I don't mean at runtime but at design time, like a code snippet). Perhaps with a third party utility? 回答1: I'm not familiar with Express enough to know if they removed this feature, but you should just be able to right-click your public class MyClass : MyInterface statement and choose "Implement Inteface". If this is removed in Express, you can always use Resharper for this

GNU make: Generating automatic dependencies with generated header files

为君一笑 提交于 2019-11-27 20:15:48
So I followed the Advanced Auto-Dependency Generation paper -- Makefile : SRCS := main.c foo.c main: main.o foo.o %.o: %.c $(CC) -MMD -MG -MT '$@ $*.d' -c $< -o $@ cp $*.d $*.tmp sed -e 's;#.*;;' -e 's;^[^:]*: *;;' -e 's; *\\$$;;' \ -e '/^$$/d' -e 's;$$; :;' < $*.tmp >> $*.d rm $*.tmp clean:: -rm *.o *.d main -include $(SRCS:.c=.d) main.c : #include "foo.h" int main(int argc, char** argv) { foo() ; return 0 ; } foo.h : #ifndef __FOO_H__ #define __FOO_H__ void foo() ; #endif -- and it works like a charm. But when foo.h becomes a generated file -- Makefile: ... HDRS := foo.h $(HDRS): mk_header

Does Rails need database-level constraints?

故事扮演 提交于 2019-11-27 19:45:32
I have the same problem as in the following post . So I am wondering, why doesn't Rails support generating foreign keys by default? Isn't it necessary? Or are we supposed to do it manually? Database constraints aren't required any more than wearing seat-belts are required in your car. You can drive around all you like and everything will work great until a problem arrives. The seat-belt (constraints) keep you (the data) safe. So it's highly recommended that you create constraints to enforce data-integrity at the database level, because it's highly likely that 1) You will interact with the

Any reason to write the “private” keyword in C#?

亡梦爱人 提交于 2019-11-27 18:26:10
As far as I know, private is the default everywhere in C# (meaning that if I don't write public , protected , internal , etc. it will be private by default). (Please correct me if I am wrong.) So, what's the reason to write that keyword, or why does it even exist for members? For example, when an event handler is auto-generated it looks like this: private void RatTrap_MouseEnter(object sender, CheeseEventArgs e) { } But why does it even write private if that's implied and default? Just so that novice developers (who don't know it's the C# default) know that it's private? Or is there a

Getting auto-generated key from row insertion in spring 3 / PostgreSQL 8.4.9

随声附和 提交于 2019-11-27 18:07:19
I would like to retrieve the auto-generated id from a row insertion, but I get a NullPointerException Here is the code : long result = 0; final String SQL = "INSERT INTO compte (prenom, nom, datenaissance, numtelephone) " + " VALUES(?,?,?,?)"; KeyHolder keyHolder = new GeneratedKeyHolder(); int row= this.jdbcTemplate.update(new PreparedStatementCreator(){ public PreparedStatement createPreparedStatement(Connection connection) throws SQLException { PreparedStatement ps =connection.prepareStatement(SQL); ps.setString(1, a.getSurname()); ps.setString(2, a.getName()); ps.setDate(3, a.getDob()); ps

Auto generate function documentation in Visual Studio

纵饮孤独 提交于 2019-11-27 10:12:39
问题 I was wondering if there is a way (hopefully keyboard shortcut) to create auto generate function headers in visual studio. Example: Private Function Foo(ByVal param1 As String, ByVal param2 As Integer) And it would automagically become something like this... '---------------------------------- 'Pre: 'Post: 'Author: 'Date: 'Param1 (String): 'Param2 (Integer): 'Summary: Private Function Foo(ByVal param1 As String, ByVal param2 As Integer) 回答1: Make that "three single comment-markers" In C# it's

Changing autogenerated code in a C# Windows Forms Application project

蓝咒 提交于 2019-11-27 07:17:46
问题 When you open a new C# Windows Forms Application project in Visual Studio 2008, you get a lot of autogenerated code (AssemblyInfo.cs, Resources.Designer.cs, Settings.Designer.cs, Form1.Designer.cs, Form1.resx, Program.cs). Beside adding components from the Toolbox to Form1.cs[Design] and code to Form1.cs, what files can you change? And how? And what files should be left as they are? PS: This is a vast subject, as far as I can tell. I don't expect an exhaustive answer. Any information you care

How configure Intellij Idea javadoc templates?

本秂侑毒 提交于 2019-11-27 04:30:26
I have some method: public int getSomeField() I want to generate javadoc like this: /** * Gets {someField} * * @return value of {someField} */ Where {someField} is placeholder for field name. It is possible to create this templates for Intellij Idea (may be as live template)? Will Humphreys Bring up the Generate menu (Cmd+N on Mac, Alt+Insert on Windows) Click the ellipsis in the top right hand corner. Click the plus in the top left corner and create a new template. Copy the contents of the old template into the new template and add the following lines to the top of it. /** * Gets $field.name