I think it is a bad idea to send a longer string when you already know the length of the field...... With or without truncation. This is a validation rule of your domain. Why going to the database when you already know that is going to fail?
2010/9/23 Tyler Burd <[email protected]> > Maybe it's standard across other DB engines, or maybe I'm just missing > something obvious, but silently truncating strings by default (and thus > encouraging the practice) seems like a BAD idea to me... > > Tyler Burd > > -----Original Message----- > From: [email protected] [mailto:[email protected]] On Behalf > Of Fabio Maulo > Sent: Thursday, September 23, 2010 9:06 AM > To: [email protected] > Subject: Re: [nhusers] Nhibernate 3 truncate behaviour > > No, it is not a bug istead it is a specific request to make happy > MsSqlServer. > If you want the old behavior you have to copy&paste the SqlClientDrive > and disable the actual behavior, the you have to specify your > implementation in the sessio-factory configuration. > > -- > Fabio Maulo > > > El 23/09/2010, a las 11:10, Maxim Filimonov <[email protected]> > escribió: > > > Dear Everybody, > > I've played with Nhibernate 3 Alpha 2 for a while and recently found a > > bit confusing behaviour at least from standpoint of compatability with > > version 2.1.2. > > A problem occurs when I try to insert(didn't try to update but I > > suppose it can have the same problem) string value to column with > > limited length. > > In 2.1.2 when such insert occurs my db engine(MSSQL SERVER 2008) > > throws an exception "String or binary data would be truncated." which > > gives me ability to rollback transaction at least if business layer > > didn't check length of a field. With the version 3.0 Alpha 2 db engine > > doesn't throw any exception on such insert because value is truncated > > automagically by nhibernate. Generated SQL: > > 2.1.2: > > exec sp_executesql N'INSERT INTO Customers (FirstName) VALUES (@p0); > > select SCOPE_IDENTITY()',N'@p0 nvarchar(16)',@p0=N'MoreThan3Symbols' > > 3.0: > > exec sp_executesql N'INSERT INTO Customers (FirstName) VALUES (@p0); > > select SCOPE_IDENTITY()',N'@p0 nvarchar(3)',@p0=N'Mor' > > > > My mapping: > > <class name="TruncateBug.Customer,TruncateBug" table="Customers"> > > <id name="CustomerId" column="CustomerId"> > > <generator class="native"/> > > </id> > > <property name="FirstName" column="FirstName" length="3"/> > > </class> > > And the code that doesn't produce exception anymore: > > var invalidCustomer = new Customer() { FirstName = > > "MoreThan3Symbols" }; > > int id = (int)session.Save(invalidCustomer); > > > > And yes session will contain Customer object with full length > > FirstName which could lead to a lot of misunderstanding in further > > usage of the Customer object in scope of this session. > > > > Maybe it's not a bug but a feature but then I hope there is a way to > > configure nhiberate to throw exception as previously and to not try to > > create magic for me. > > > > Thanks in advance, > > Yours sincerely, > > Maxim Filimonov > > > > -- > > You received this message because you are subscribed to the Google Groups > "nhusers" group. > > To post to this group, send email to [email protected]. > > To unsubscribe from this group, send email to > [email protected]<nhusers%[email protected]> > . > > For more options, visit this group at > http://groups.google.com/group/nhusers?hl=en. > > > > -- > You received this message because you are subscribed to the Google Groups > "nhusers" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]<nhusers%[email protected]> > . > For more options, visit this group at > http://groups.google.com/group/nhusers?hl=en. > > -- > You received this message because you are subscribed to the Google Groups > "nhusers" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]<nhusers%[email protected]> > . > For more options, visit this group at > http://groups.google.com/group/nhusers?hl=en. > > -- You received this message because you are subscribed to the Google Groups "nhusers" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/nhusers?hl=en.
