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Thoughts around ORM, .NET and SQL databases.

Monday, June 19, 2017

DataObjects.Net 5.0.14

We've released a new final version recently. Here are the changes we have made:

[main] Returned expected behavior of delayed queries which was changed in 5.0.11 by bug fix for IN() operation.

In 5.0.11 we had made some changes and fixed certain cases of IN() operation usage which supposed to create temporary table, but didn't. These changes brought unexpected behavior for delayed queries. In this release we kept the cases fixed and returned old behavior for delayed queries.

[main] Fixed bug when Server profile sessions allowed to query database without transaction.

IMPORTANT! This bug fix might be a breaking change for those users who already use it. Officially, SessonOptions.ServerProfile option does not allow queries outside of transaction. So we have returned this behavior. If you require such non-transactional queries, you should include an additional option to your session configuration - SessionsOptions.NonTransactionalReads.

[mysql] Corrected column types' extraction.

As usual you can download it from our official website or install it from Nuget library

Tuesday, January 31, 2017

DataObjects.Net 5.0.11

We've released a new final version recently.

We performed following changes:

[main] Constraints can be skipped on transaction commit
[main] Operations like EntitySet<T>.ToList() no longer lead to incorrect EntitySet<T>.Count value
[main] IN() operation now creates temporary tables when it supposes to
[main] Fixed translations of aggregates like IQueryable<T>.Sum() when selector parameter can be omitted
[main] Enum constants in IndexAttribute.Filter expression are translated correctly now
[main] Fixed certain scenarios when enum constants caused query translation error

As usual you can download it from our official website or install it from Nuget library

Monday, December 26, 2016

Winter sale

This year we're starting our winter sale right on December 27. Just use the coupon code DO2017 on checkout and get 50% off all editions of DataObjects.Net. If you want to renew your subscription use DO2017RENEWAL to get 70% discount. 

This special on our products is valid until Wednesday 15 January 2017.

Should you have any questions, please email to

Friday, December 23, 2016

DataObjects.Net 5.0.11 RC2

We released DataObjects.Net 5.0.11 RC2 last Friday. The list of changes is below:

[main] Fixed build in Perform/PerformSafely modes when there is no Metadata tables in database/schema
[main] Added support for CONTAINSTABLE queries for SQL Server providers
[main] Optimized memory usage for storage nodes which are build in Skip mode
[main] Full-text indexes are now allowed for fields of structures
[main] Added highest ranked matches limitation support for free-text queries
[main] ReferenceFinder now excludes references which were locally removed
[main] Fixes certains scenarios when changes do not clear on after persist
[postgresql] Fixed extraction of columns associated with DateTimeOffset fields

As usual you can download it from our official website or install it from Nuget library

Thursday, September 22, 2016

Support for DateTimeOffset for PostgreSQL provider

We have introduced DateTimeOffset support for PostgreSQL provider in 5.0.11 RC. Here, we want to explain some restrictions of this RDBMS which affect our implementation of that type support.

We warn you that support for date/time with time zone is different from Oracle Database and Microsoft SQL Server implementations. The last two RDBMS has full support for all parts of date/time including time zone, but PostgreSQL doesn't.

If you want to use DateTimeOffset type in domain models on PostgreSQL storage we need to explain some things you may face with.

DataObjects.Net 5.0.11 RC

We released DataObjects.Net 5.0.11 RC this Wednesday. The list of changes is below:

[main] Full-text indexes no longer cause domain building error in DomainUpgradeMode.Skip mode
[main] Fixed temporary keys remap which showed up in previous version
[postgresql] Updated version of client library
[postgresql] Added support for DateTimeOffset

As usual you can download it from our official website or install it from Nuget library

Friday, August 05, 2016

DataObjects.Net 5.0.10

We've just released DataObjects.Net 5.0.10 Final. It contains several changes, such as:

  [main] Remap of temporary to real keys, no longer restore nulled references to an Entity
  [main] Fixed certain cases of session cache returning null for a valid key
  [main] Fixed certain cases when EntitySet could return nulls instead of removed Entities on enumeration

As usual, you may get it from our website or from Nuget library.

Also, we have several changes planned for the next version.We have scheduled to fix the following list of issues:

- Incorrect translation of IndexAttribute.Filter underlying expression when it contains enum values;
- Usage of our In() extension in queries does not create temporary table when it supposes to;
- Exception on translation of IQueryable<>.Sum() when selector can be easily omitted.

*Current list of changes planned for the next release is not final and may be appended by additional issues or improvements, up-to-date list is available on DataObjects.Net website

Thursday, June 30, 2016

DataObjects.Net 5.0.10 RC

We've just released DataObjects.Net 5.0.10 RC. It contains several changes, such as :

  [main] Cross-hierarchical persistent type movements are unsafe actions now
  [main] Added Support for Domain building on read-only database in UpgradeMode.Skip mode
  [main] Fixed incorrect translation of persistent interface queries occured in some scenarious
  [main] Fixed certain cases of storage node metadata corruption
  [main] Improved unsaved reference registration
  [sqlite] Added Support for DateTimeOffset fields and basic operations with them
  [oracle] Corrected extraction of DateTimeOffset columns
  [weaver] Fixed pdb-files handling created by Roslyn

  Note that:
    - DataObjects.Net does not currently control changes of entities when domain is built on read-only storage, it is managed by the storage side instead. DataObjects.Net layer entity changes control is among our current tasks.
    - Some operations with DateTimeOffset fields are not currently supported as they are not supported by SQLite.

As usual, you may get it from our website or from Nuget library.

Also, we have serveral changes planned for the next version. Currently the list contains such issues as:

- EntitySet is full of nulls after passing it as parameter to Session.Remove(IEnumerable);
- Unexpected prefetch behavior with Session cache in certain sittuations.

*Current list of changes planned for the next release is not final and may be appended by additional issues or improvements, up-to-date list is avaliable on DataObjects.Net website

Monday, February 15, 2016

DataObjects.Net 5.0.8

We've just released DataObjects.Net 5.0.8. It contains several changes, such as :

[main] Fixed translation of EnumerableExtensions.IsNullOrEmpty();
[main] Fixed Domain building on empty database/schema;
[main] Fixed incorrect translation of POCO constructors in some cases.

As usual, you may download it from download page on our website or from Nuget library.

Tuesday, September 16, 2014

DataObjects.Net 5.0.2

We've already released DataObjects.Net 5.0.2 which containst several fixes. All changes are described bellow.

Changes in DataObjects.Net 5.0.2:

     [main] Association between Key fields no longer creates an additional index
     [main] Fixed: DataObjects.Net puts type identifier into the wrong column
     [main] Fixed: incorrect left join behavior
     [main] Fixed: PhoneNumberConstraint validator cloning
     [mysql] Fixed: wrong SQL for multiple join statement.

Just as always you can get it from our site or NuGet gallery.