how to rename database table in entity framework

In addition your DBA would like you to rename the MigrationId column to Migration_ID. The goal of this tutorial is to explain how you can create data access classes using the Microsoft Entity Framework when building an ASP.NET MVC application. When you submit the form, the second Add() action is invoked. The first Add() action simply returns a view. In addition your DBA would like you to rename the MigrationId column to Migration_ID. This is entity framework tutorials series part-5 . You can use the controller action in Listing 6 to delete a particular database record. This will configure the migrations history table in the default way which you then tweak in the overriding method. Manually edit the Up and Down methods of the migration to use the RenameColumn method to replace the AddColumn and DropColumn that it automatically generates for you. Lets say you want to rename the migrations history table and put it to a custom schema called admin. Typically when you configure EF models you dont need to call base.OnModelCreating() from the overridden OnModelCreating method since the DbContext.OnModelCreating() has empty body. You can open the Entity Designer at any time by double-clicking the MoviesDBModel.edmx file contained in the Models folder within the Solution Explorer window. EF6 Onwards Only - The features, APIs, etc. This is not the case when configuring the migrations history table. TutorialsTeacher.com is optimized for learning web technologies step by step. Zzz-19 and Zzz-23 explain the database-first technique using the Asp.net Identity Entity Framework, which is not exactly simple. By the end of this tutorial, you'll understand how to use the Entity Framework to select, insert, update, and delete database records. You can view these classes by opening the MoviesDBModel.Designer.cs file from the Solution Explorer window. Notice that a safelist is supplied to specify the exact properties to update. The first Edit() action returns an HTML form for editing a movie record. In order to use the Entity Framework, you need to create an Entity Data Model. discussed in this page were introduced in Entity Framework 6. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. The Table attribute can be applied to a class to configure the corresponding table name in the database. The fluent api can be used to modify a table's name:.protected override void OnModelCreating (DbModelBuilder modelBuilder) { modelBuilder.Entity<Table2> ().ToTable ("MyCustomTable2Name"); } .You can override this procedure in your.DbContext. SQL Script: Rename Table in MySQL, PostgreSQL, and SQLite ALTER TABLE Employee RENAME TO Emp; This tutorial assumes no previous knowledge of the Microsoft Entity Framework. How to create and add initial data row to new table using Entity Framework 6 Code First migrations C# Entity Framework : Rename table field without losing data, using automatic migrations In this video, I am going to show you, How to change Database table name in ASP.NET CORE. If either property is missing a value, then a validation error message is added to ModelState and ModelState.IsValid returns the value false. Enable-Migrations and Update-Database detailed explanation, here. , table: "tablename", newName: "newname", schema: "schema"); Ishika Jain 717. score:4 . I want use human names in code. Just run your migration. Double-click the MoviesDB.mdf file to open the Server Explorer/Database Explorer window. If you are using an earlier version, some or all of the information does not apply. Step 2. Next, the Add() action performs some simple form validation. If input is accepted from such sources it should be validated before being passed to these APIs to protect against SQL injection attacks etc. Notice that an Edit and Delete link is displayed next to each record. Furthermore, an Add Movie link appears at the bottom of the view (see Figure 7). Follow these steps. The purpose of this tutorial was to demonstrate how you can build database-driven web applications by taking advantage of ASP.NET MVC and the Microsoft Entity Framework. detailed explanation, here. The expression _db.MovieSet represents all of the records from the Movies database table. The demos . This action can be invoked only when performing an HTTP POST operation. How i can change name entity, but no change table name in database? One to many relationship between AspNetUsers (Identity) and a custom table, Invalid object name 'dbo.AspNetUsers' in Asp.NET MVC 5 Entity Framework, How to map AspNetUser table id as foreign key to another table. The Migrations feature of EF works exceptionally well at taking it a step further and managing the in-between states of the database, so I like to leverage it whenever possible. Now you can go to the Package Manager Console, Enable-Migrations, Add-Migration and finally Update-Database. The movie records are retrieved with the help of LINQ to Entities. Remember to save your Entity Data Model after making a modification by clicking the Save button (the icon of the floppy disk). This should result in adding to the database a migrations history table configured according to the details you specified in your HistoryContext derived class. The view in Listing 2 contains a foreach loop that iterates through each movie record and displays the values of the movie record's Title and Director properties. Don't modify the code in the Designer.cs file since your changes will be overwritten the next time you use the Entity Designer. You learn how to use the Entity Wizard to create an ADO.NET Entity Data Model. Open Entity Model Browser; Navigate to your entity under YourModel/Entity Types; right click + Properties; You can chance entity type name here; Or using designer: right click on your entity on the design pane + Properties from context menu ; Change Name property value; It will change generated entity class name without changing the database . Over the course of this tutorial, we build a web application that illustrates how to select, insert, update, and delete database data by using the Entity Framework. In other words, the Wizard gave the class the very same name as the database table. If you're doing Database First and are using the EDMX designer then you must use the designer to rename the column. If you prefer, you can use LINQ query syntax instead. Right-click the App_Data folder in the Solution Explorer window and select the menu option Add, New Item. Alternatively, you can change the name of an entity in the Properties window after selecting an entity in the Entity Designer. At the moment there is no built-in support for changing the database schema at runtime. Before you start you need to know that you can customize the migrations history table only before you apply the first migration. You can use the Entity Framework to make it easy to insert new records into a database table. This has changed in Entity Framework 6 however and the migrations history table is no longer marked a system table. There are several alternatives to the Entity Framework that you can use with ASP.NET MVC. The Microsoft Entity Framework is an Object Relational Mapping (O/RM) tool that enables you to generate a data access layer from a database automatically. In the Table Designer, add the Id, Title, and Director columns. From the Add New Item dialog box, select SQL Server Database, give the database the name MoviesDB.mdf, and click the Add button. After you complete these steps, the ADO.NET Entity Data Model Designer (Entity Designer) opens. More info about Internet Explorer and Microsoft Edge, Right-click the App_Data folder in the Solution Explorer window and select the menu option. More info about Internet Explorer and Microsoft Edge, You need to change names and/or facets of the columns to enable a 3, You need to use a non-default schema for the __MigrationHistory table, You need to store additional data for a given version of the context and therefore you need to add an additional column to the table. Finally, if there are no validation errors, then the underlying Movies database table is updated with any changes by calling the SaveChanges() method. The TryUpdateModel() method takes the fields in the FormCollection passed to the Add() method and assigns the values of these HTML form fields to the Movie class. Change types for both. . SQL Script: Rename Table in MySQL, PostgreSQL, and SQLite. First, we discussed how you can use the Entity Data Model Wizard to generate an Entity Data Model from within Visual Studio. The first is the usage of the fluent syntax to tell the builder that `Widget` should map to the table Cars, and it has a specific primary key column (which you can see we renamed.) Use the sp_rename built-in stored procedure to rename a table in the SQL Server database. This article assumes you know how to use Code First Migrations in basic scenarios. The second Add() action creates a new instance of the Entity Framework Movie class with the help of the ASP.NET MVC TryUpdateModel() method. DataAnnotations is used to configure the classes which will highlight the most commonly needed configurations. How to control Windows 10 via Linux terminal? Examples might be simplified to improve reading and basic understanding. Coding example for the question How to rename a database column in Entity Framework 5 Code First migrations without losing data?-Entity Framework. The Wizard created a new data access class named Movies. Next, you learn how to use LINQ to Entities to retrieve a set of database records from a database table. Listing 3 Controllers\HomeController.cs (Add methods). The second Edit() action attempts to update the database. You have 2 options: 1. If there are no validation errors then a new movie record is added to the Movies database table with the help of the Entity Framework. Make sure that the original table name is correct, and the new name has not been used with other database objects; otherwise, it will raise an error. In this tutorial, you learn how to use ASP.NET MVC with the Microsoft Entity Framework. Entity Framework Migrations APIs are not designed to accept input provided by untrusted sources (such as the end user of an application). The Delete() action first retrieves the Movie entity that matches the Id passed to the action. Why am I getting some extra, weird characters when making a file from grep output? To add some clarity: OnModelCreating has its purpose, and that's to let EF know of relationships, keys, entity-to-table relationships, etc. There is no difference in performance between the two approaches the only difference is style. Double-click the MoviesDB.mdf file to open the Server Explorer/Database Explorer window. DataAnnotations are also understood by a number of .NET applications, such as ASP.NET MVC which allows these applications to leverage the same annotations for client-side validations. Tables this database have names kind GUID. For example, you can use the Entity Designer to change the names of the classes that the Entity Model Data Wizard generates. Listing 1 Controllers\HomeController.cs. What binds ApplicationUser to the aspnetusers table in Database First? The new record is added to the database with the following two lines of code: The first line of code adds the new Movie entity to the set of movies being tracked by the Entity Framework. The ToList() method is used to convert the set of movies into a generic collection of Movie objects (List). The _db field is an instance of the MoviesDBEntities class that was generated by the Entity Designer. How to rename a database column in Entity Framework 5 Code First migrations without losing data? The Home controller in Listing 1 exposes an action named Index(). Behind the scenes, the Entity Designer generates a set of C# classes. Write the following code in the Global.asax.cs file's Application Start() method. of use and privacy policy. Add-Migration ColumnChanged) When editing database records, you need to pass the Id of the record being edited to the controller action that performs the database update. When using the Entity Framework, you must supply a "safelist" of properties when using the TryUpdateModel or UpdateModel methods to update the properties of an entity class. Finally, the user is redirected back to the Index view. In Entity Framework 5 this table was a system table if the application used Microsoft Sql Server database. The Movie Database application uses a database table named Movies that contains the following columns: You can add this table to an ASP.NET MVC project by following these steps: After you create the Movies database table, you should add some sample data to the table. If I understood question correctly OP wants to use, in database tableName = dvtable_5b607ffc_7ea2_47b1_90d4_bb72a0fe7280, in db.Context i want use tableName = Persons instead dvtable_5b607ffc_7ea2_47b1_90d4_bb72a0fe7280. Validation error message is how to rename database table in entity framework to ModelState expand the MoviesDB.mdf database connection, right-click the Tables folder and When posting an HTML form the Global.asax.cs file 's application start ( ) action to retrieve set. 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