Category: entity

EF Record and play – conclusions

 

Part 1 : What is EF record and play : http://msprogrammer.serviciipeweb.ro/2014/11/29/entity-framework-6-record-and-play-1-of-5/ 

Part 2: EF Record and play use: Testing : http://msprogrammer.serviciipeweb.ro/2014/12/08/entity-framework-6-record-and-play-use-unit-testing-part-2-of-5/

Part 3: EF Record and play use: Make demo: http://msprogrammer.serviciipeweb.ro/2014/12/14/entity-framework-6-record-and-play-use-making-demos-part-3-of-5/ 

Part 4: EF Record and play use: Record user Sql when a bug occurs: http://msprogrammer.serviciipeweb.ro/2014/12/26/ef-record-and-play-use-recording-user-sql-when-a-bug-occurred-part-4-of-5/

Part 5: EF record and play: conclusions: http://msprogrammer.serviciipeweb.ro/2015/01/05/ef-record-and-play-conclusions/

 

 

I have show to you how easy you can record and play again Entity Framework 6 actions. Also, some possible uses as testing, making demos and record user Sql.

One possible use that can be done is Profiling  – analyzing sql – for example, just like MiniProfiler or EFProfiler does. Read this article about profiling : http://msdn.microsoft.com/en-us/magazine/gg490349.aspx

I hope you enjoy this piece of code.

Source code is available at https://github.com/ignatandrei/EFRecordAndPlay/wiki/
There is also a NuGet package at https://www.nuget.org/packages/EFRecordAndPlay/

Video at https://www.youtube.com/playlist?list=PL4aSKgR4yk4Mi1eLKArsgoqQRluxXv2-Y

EF Record and play use: Recording user sql when a bug occurred (part 4 of 5)

 

Part 1 : What is EF record and play : http://msprogrammer.serviciipeweb.ro/2014/11/29/entity-framework-6-record-and-play-1-of-5/ 

Part 2: EF Record and play use: Testing : http://msprogrammer.serviciipeweb.ro/2014/12/08/entity-framework-6-record-and-play-use-unit-testing-part-2-of-5/

Part 3: EF Record and play use: Make demo: http://msprogrammer.serviciipeweb.ro/2014/12/14/entity-framework-6-record-and-play-use-making-demos-part-3-of-5/ 

Part 4: EF Record and play use: Record user Sql when a bug occurs: http://msprogrammer.serviciipeweb.ro/2014/12/26/ef-record-and-play-use-recording-user-sql-when-a-bug-occurred-part-4-of-5/

Part 5: EF record and play: conclusions: http://msprogrammer.serviciipeweb.ro/2015/01/05/ef-record-and-play-conclusions/

 

In this video tutorial I will show how to see the sql when a database bug occurs.

Let’s suppose that a department should have the name not null – and , by mistake, we have not prevented the registering of a null in the name of the department

We put those lines

 
 #region set record EF
            record = new InterceptionRecordOrPlay(@"DemoEmployeeAndDepartment.zip", ModeInterception.Record);

            DbInterception.Add(record);
            #endregion

We register the null name department and  in the DemoEmployeeAndDepartment.zip we see the error

<?xml version="1.0"?>
<InterceptionData xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <CommandText>INSERT [Department]([NameDepartment])
VALUES (NULL)
; SELECT [Id]
FROM [Department]
WHERE [Id] = CAST (@@IDENTITY AS int)</CommandText>
  <NonQuery>0</NonQuery>
  <ThrownExc>
    <ExceptionType>System.Data.SqlServerCe.SqlCeException</ExceptionType>
    <ExceptionMessage>The column cannot contain null values. [ Column name = NameDepartment,Table name = Department ]</ExceptionMessage>
  </ThrownExc>
</InterceptionData>

Source code is available at https://github.com/ignatandrei/EFRecordAndPlay/wiki/
There is also a NuGet package at https://www.nuget.org/packages/EFRecordAndPlay/

Entity Framework 6 Record and play use : Making demos ( part 3 of 5)

 

Part 1 : What is EF record and play : http://msprogrammer.serviciipeweb.ro/2014/11/29/entity-framework-6-record-and-play-1-of-5/ 

Part 2: EF Record and play use: Testing : http://msprogrammer.serviciipeweb.ro/2014/12/08/entity-framework-6-record-and-play-use-unit-testing-part-2-of-5/

Part 3: EF Record and play use: Make demo: http://msprogrammer.serviciipeweb.ro/2014/12/14/entity-framework-6-record-and-play-use-making-demos-part-3-of-5/ 

Part 4: EF Record and play use: Record user Sql when a bug occurs: http://msprogrammer.serviciipeweb.ro/2014/12/26/ef-record-and-play-use-recording-user-sql-when-a-bug-occurred-part-4-of-5/

Part 5: EF record and play: conclusions: http://msprogrammer.serviciipeweb.ro/2015/01/05/ef-record-and-play-conclusions/

 

 

Let’s assume you want to register a demo for a application ( Desktop or Web).

You do arrange the database and you make some repetition before. However, the database must be re-arranged the next time you will make the demo.

For this case you can use EF 6 Record and play – it will make a .zip file with containing resultsets and you can make indefinitely the repetition of the demo – without the real database.

 

Let’s see in action here

 

 

The code is simple 

 Database.SetInitializer<ContextForDatabase>(null);
            #region set record EF
            record = new InterceptionRecordOrPlay(@"DemoEmployeeAndDepartment.zip", ModeInterception.Play);

            DbInterception.Add(record);
            #endregion

Source code is available at  https://github.com/ignatandrei/EFRecordAndPlay/wiki/

There is also a NuGet package at https://www.nuget.org/packages/EFRecordAndPlay/

Entity Framework 6 Record and play use : Unit Testing ( part 2 of 5)

 

Part 1 : What is EF record and play : http://msprogrammer.serviciipeweb.ro/2014/11/29/entity-framework-6-record-and-play-1-of-5/ 

Part 2: EF Record and play use: Testing : http://msprogrammer.serviciipeweb.ro/2014/12/08/entity-framework-6-record-and-play-use-unit-testing-part-2-of-5/

Part 3: EF Record and play use: Make demo: http://msprogrammer.serviciipeweb.ro/2014/12/14/entity-framework-6-record-and-play-use-making-demos-part-3-of-5/ 

Part 4: EF Record and play use: Record user Sql when a bug occurs: http://msprogrammer.serviciipeweb.ro/2014/12/26/ef-record-and-play-use-recording-user-sql-when-a-bug-occurred-part-4-of-5/

Part 5: EF record and play: conclusions: http://msprogrammer.serviciipeweb.ro/2015/01/05/ef-record-and-play-conclusions/

 

Let’s suppose that we have a program that have Departments and Employees.

And we want to make sure that, when we add an employee, the department must exists.

We can ensure this from database ( by foreign key) but we can pro-actively search for the department and throw a more meaningful validation .

More, I like more validation than errors.

So, let’s suppose that in the Validation for the Employee we must check in the database for the IdDepartment to see if there is such a department.

How could we make a test for that runs without a database ?

With some trick:  we first Record with a database  – then we can Play the file – and we do not need anymore the database. The test is self contained. 

 

Let’s see in action here

 

Database.SetInitializer<ContextForDatabase>(null);
            #region set record EF
            var record = new InterceptionRecordOrPlay(@"VerifyIValidatableWorks.zip", ModeInterception.Play);

            DbInterception.Add(record);
            #endregion
            var e= new Employee();
            e.ValidateEmployee = true;
            e.IDDepartment = 60000;
            var err= e.Validate(null).ToArray();
            Assert.IsNotNull(err);
            Assert.AreEqual(1, err.Length);

Source code is available at  https://github.com/ignatandrei/EFRecordAndPlay/wiki/

 

There is also a NuGet package at https://www.nuget.org/packages/EFRecordAndPlay/

Entity Framework 6 Record and play – 1 of 5

 

Part 1 : What is EF record and play : http://msprogrammer.serviciipeweb.ro/2014/11/29/entity-framework-6-record-and-play-1-of-5/ 

Part 2: EF Record and play use: Testing : http://msprogrammer.serviciipeweb.ro/2014/12/08/entity-framework-6-record-and-play-use-unit-testing-part-2-of-5/

Part 3: EF Record and play use: Make demo: http://msprogrammer.serviciipeweb.ro/2014/12/14/entity-framework-6-record-and-play-use-making-demos-part-3-of-5/ 

Part 4: EF Record and play use: Record user Sql when a bug occurs: http://msprogrammer.serviciipeweb.ro/2014/12/26/ef-record-and-play-use-recording-user-sql-when-a-bug-occurred-part-4-of-5/

Part 5: EF record and play: conclusions: http://msprogrammer.serviciipeweb.ro/2015/01/05/ef-record-and-play-conclusions/

 

Entity Framework Record And Play

With this helper you can record and then play the actions in Entity Framework(>= 6).

For recording actions just reference the dll and use

DbInterception.Add(new InterceptionRecordOrPlay(@"a.zip", ModeInterception.Record));

(Note: For ASP.NET you will use Server.MapPath("~/a folder that supports write/namefile.zip")

For replay use

DbInterception.Add(new InterceptionRecordOrPlay(@"a.zip", ModeInterception.Play));

This can be use for

  1. Unit Testing
  2. Making demos
  3. Recording user actions when a bug occurred

 

Source code is available at  https://github.com/ignatandrei/EFRecordAndPlay/wiki/

and has also a test 😉

There is also a NuGet package at https://www.nuget.org/packages/EFRecordAndPlay/ 

 

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