entity framework multiple tables same structure

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EF: Seed of Migrations.Configuration vs Seed of DropCreateDatabaseAlways? Actually the system should have another way to dynamically generates the tables every day. It seems that you try to use LINQ to SQL or Entity Framework as the Entity Data Model, if so, it hard to do this. Add-Migration -configuration <DbContext-Migrations-Configuration-Class-withNamespaces> <Migrations-Name>. Your choices are: https://entityframework.net/knowledge-base/31935232/entity-framework-6-creating-two-table-from-the-same-entity-object#answer-0. You would see there are two files generated in the Migrations folder. Fastest Entity Framework Extensions Bulk Insert Bulk Delete Bulk Update Bulk Merge Accepted Answer You cannot have multiple DbSet pointing to the same class in one DbContext. mapping multiple tables to a single entity class in entity framework. Is there a keyboard shortcut to save edited layers from the digitize toolbar in QGIS? Sales, Marketing, Jobs, Shipping . Entity Framework insert object with multiple navigation properties of same type and id I have read several posts about this (e.g. table_1, table_2. Your options are: Creating new class with same properties Inheritance Using different DBContext s DDan .Why can't EF handle two properties with same foreign key, but separate references/instances?.) 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I'm attempting to build two Entity A instances with distinct table names. And now for a completely different approach which I have used successfully in EF Core: Create a parameterized stored procedure which uses some dynamic SQL to return the actual table you want and use the FromSql feature. Finally i called the First () method with simple Sql command as a parameter with table name on MyDbContext object and that's it. An example of data being processed may be a unique identifier stored in a cookie. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. Find centralized, trusted content and collaborate around the technologies you use most. An exception will be thrown by the code in the DBConext. I want to query them. directing to the same class in oneDbContext Step 3 When the Littlewood-Richardson rule gives only irreducibles? this is my structure: public class Beneficio { [Key] [DatabaseGenerated (DatabaseGeneratedOption.Identity)] public int Id { get; set; } public int ComercioBeneficioId { get; set; } public int ComercioOtorgadorId . Image example below: I have tried to set relations on the modelBuilder like this: builder .HasMany (c => c.Users) .WithOne (u => u.CurrentAssociatedCompany) .HasForeignKey (u => u.CurrentAssociatedCompanyId) .IsRequired (); Entity Framework creating duplicate objects from list when object has composite Primary Key. For example, db_en_games and db_fr_games are practically the same type of tables, containing different data. DbContext configuration . I have an existing SQL database with some 500 tables in it, and we are in the process of considering a move from Linq->SQL to Entity Framework as our main data access layer. If it's feasible to build two table instances from a single defined entity object type, that is what I was wondering. Can I use one connection string to use multiple databases with the same table structure in Entity Framework? What to throw money at when trying to level up your biking from an older, generic bicycle? I don't understand the use of diodes in this diagram. How to add an object multiple times in different tables with Entity Framework Core [Tracking error], Multiple threads reading unique records from the same table with Entity Framework. The number of tables can be dynamic based on configuration. Youll be auto redirected in 1 second. Here is the basic rule to migrate changes in database, when there are multiple Context classes within the same project. Step 2 Expand the Installed templates then expand Visual C# then expand Web then select Visual Studio 2012 then select ASP.NET MVC 4 Web Application as a new project. At runtime, can Entity Framework connect to several databases (with the same schema)? Were sorry. For example: Constructor: public MyDbContext(string connectionString) : base(connectionString) { } Processing Class code: In Entity Framework, create vs. new Object>. How can I reference a generic data table (without causing a query)? Continue with Recommended Cookies. We have a database with multiple tables with Same structure. Conclusion We have solved the problem of entity framework 6 where creating multiple tables with the different names on DbSet object was not officially supported. You can't have more than oneDbSet Manage Settings Connect and share knowledge within a single location that is structured and easy to search. Entity Framework - extra dynamicly calculated properties for business objects/models (ASP.NET MVC), How to enable identity insert on EF - code first context.Seed() and then disable again once data has been seeded. Entity Data Model for Multiple Tables that share the same Schema, ADO.NET, Entity Framework, LINQ to SQL, Nhibernate. If you work through an EntityConnection in the constructor of your entities object, you can change the database pretty easily. Add Department Controller Right click on the "Controllers" folder and add a MVC5 Empty Controller with the name DepartmentController and then Copy and paste the following code into it. I have multiple tables generated at runtime. You could create a view in your DB and generate the entity from that. The number of tables can be dynamic based on configuration. I also want to consider more of a domain driven design approach with separate data contexts managing key areas of the application ( i.e. Join two tables using LINQ to Entities, then group and total the columns from each tables. Why bad motor mounts cause the car to shake and vibrate at idle but not when you give it gas and increase the rpms? Entity Framework 4.3.1 Eager Loading Multiple Levels of Child Objects With Filter. Copyright 2022 www.appsloveworld.com. Step 1 Click File -> New -> Project. Does the Code First Entity Framework allow for that? legal basis for "discretionary spending" vs. "mandatory spending" in the USA. How to have multiple tables with the same schema in Entity Framework? When the migration is complete, you will access your Teams at stackoverflowteams.com, and they will no longer appear in the left sidebar on stackoverflow.com. These are the changes done by entity framework. Why should you not leave the inputs of unused gates floating with 74LS series logic? My DB contains several data tables that share the same schema. For example, db_en_games and db_fr_games are practically the same type of tables, containing different data. Validation failed for one or more entities while saving changes to SQL Server Database using Entity Framework, Fastest Way of Inserting in Entity Framework, Entity Framework - Include Multiple Levels of Properties. As tables are generated at runtime. I've settled on doing this but with an interface instead of an abstract class. Entity Framework insert object with multiple navigation properties of same type and id I have read several posts about this (e.g. Now let's switch to Visual Studio and create a new project. issue but none provided a satisfying solution..Using EF6, inserting an object with two navigation properties fails, when the properties have the same type . Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page. Adding existing entities to a collection on a newly built object using the entity framework. Based on the following thread, which mentioned that EF Core only supports having one mapping in the model for each entity type, which means that there aren't any supported cases in which two instance of the same type could end up being stored in different tables or different columns. And why do you even want to replace it. As usual, the examples are available over on GitHub. Is there a way to have multiple tables with the same schema? Entity Framework Modeling - How to model this simple data structure? Let us name it as "StudentModel". Getting data from many different tables in SQL using EF is slow, Dependency Injection failing in ASP.NET Core MVC and Entity Framework Core, Cast int to enum from sql query C# Entity Framework, Pass a parameter to the reusable Expression in a Entity Framework, Dealing with Enums in Asp MVC Telerik Grid and Entity Framework, DB default value ignored when creating Entity Framework model, My .saveChanges() method is not saving because it is saying an object reference is required for the non-static field, method, or property, IConfiguration does not contain a definition for Get() (EF7, vNext). Multiple Tables With Same Structure Entity Framework, How to use multiple tables with the same foreign key with Entity Framework, Entity Framework 4.3 code first multiple many to many using the same tables, Entity Framework Code-First: "The ObjectStateManager cannot track multiple objects with the same key. My questions are as following: How can I use Entity Data Model so that there will be only one data structure named GamesEntity and every dt_<lang>_games will use it? Run the below command to create the first migration: dotnet ef migrations add InitialCreate. "Instance1 Table" is made from the EntityA class. to distinguish httprequest, host name headers can be used. To simply create another instance of EntityA, one must construct a new class that extends EntityA, which sounds laborious to me. "Instance2 Table" is made from the EntityA class. Changes to a new entity with a two-level connection are not saved by Entity Framework. Why are there contradicting price diagrams for the same ETF? The content you requested has been removed. @IntoNET:The database is quite complicated and this can not be changed. Is there a way to query against multiple tables with the same table design dynamically with Entity Framework? In the later case you will have two different entity names with similar members. It is described here in ADO.NET Team Blog. My Plan is to use the same class for all the tables with same structure. Divide List object in two objects with Entity Framework, How to refer two tables, using a column in another table - Entity Framework, How to create multiple table references to one table - Entity framework. 503), Mobile app infrastructure being decommissioned, Can i create multiple tables using same model in EF core asp.net. In the following dialog box, select "Code First from . Just to write less code ? Why not normalise your database tables instead? Why does sending via a UdpClient cause subsequent receiving to fail? However a Company has multiple Users. In a .NET Core 2.1 library I need to access to a MySQL database organized in multiple schemas with tables that can have the same name . The below image shows the process of inserting ADO.NET Entity data model from the Data tab. Non-Nullable Virtual Propery in Entity Framework Code-First Model, Dynamic where clause by reading values inside a table, Issue performing calculations on grouped LINQ query outputting IEnumerable and IEnumerable figures, Problems trying to use GroupBy with multiple properties using the LINQ Method Syntax, Using multiple Databases with one DbContext, C# LINQ .net core syntax issue with Inner Join and Where, Entity Framework 5 (Code First) Navigation Properties. Is dbSet.Include pointless if called after dbSet is called? Thanks for contributing an answer to Stack Overflow! The easy way: have an abstract base class with all the properties, and map concrete types: I'm not answering whether that design is good or bad (I wouldn't say I like it as you explained it), I'm just answering the question. Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. Entity Framework, Load multiple entities by primary . Solution 3. Entity Framework and Migration with multiple schemas in a single Context, Multi-tenancy in EF6 with multiple schemas having the same tables, Update Database using Entity Framework having primary key on multiple Columns, Entity Framework Database first multiple schemas duplicate table names, Using Entity Framework 6 with Multiple DB Schemas but using One DBContext, How to create multiple table references to one table - Entity framework. Entity Framework 4.3 code first multiple many to many using the same tables Entity Framework Code-First: "The ObjectStateManager cannot track multiple objects with the same key." Entity Framework - Different proxy objects for the same entity. We just use it to create some sample tables to validate the mapping. Find a completion of the following spaces. Did find rhyme with joined in the 18th century? Create a single view for all tables with the same structure. And Include behavior with multiple paths to same destination. In this short tutorial, we've seen how we can map multiple tables to the same entity using the @SecondaryTable JPA annotation. rev2022.11.7.43014. Making statements based on opinion; back them up with references or personal experience. I have created one class representing the structure of the table. The consent submitted will only be used for data processing originating from this website. Multi-tenancy in EF6 with multiple schemas having the same tables Context is connecting to a connection string, if the connection string is resolved at runtime, then you are using One dbcontext class with httprequest specific instance. Using Entity Framework Core (5.0.17) code first I'm having trouble implementing a class that has two references to another class. Adding additional attributes to an existing class. Why are standard frequentist hypotheses so uninteresting? How to distinguish between multiple databases with the same structure and same context in the URL for an ASP.Net Core Web API; Multi-tenancy in EF6 with multiple schemas having the same tables; Multiple Tables With Same Structure Entity Framework; How can i use the select . Entity Framework 4.3 code first multiple many to many using the same tables. What is a solution to this? The DbContext of my application's Entity Framework setup (which I will refer to as ApplicationContext, the name of our derived type) contains classes for all of the tables in our SQL Server database, rather than having them spread out across multiple DbContext classes. How to have multiple tables with the same schema in Entity Framework? Where to find hikes accessible in November and reachable by public transport from Denver? Is there a term for when you use grammar from one language in another? Posted 27-Aug-14 7:14am Rajiv Gogoi Solution 2 I am trying to upgrade the data access Layer to Entity framework. How do I view the SQL generated by the Entity Framework? As we are going to use Entity Framework - Code First approach, switch to Visual Studio and right-click on Models folder to add an ADO.NET Entity Data Model item. ", Entity Framework - Different proxy objects for the same entity. Popular Answer. I need to test multiple lights that turn on individually using a single switch. NotImplemented Exceptions using MySQL Provider in ASP.NET Core With EF Core I am building an ASP.NET Core 1.1.0 application that needs to access an existing MySQL database using Entity Framework Core, which I'm building in Visual Studio 2015 with all the latest updates. .Why can't EF handle two properties with same foreign key, but separate references/instances?.) Get monthly updates by subscribing to our newsletter! Not the answer you're looking for? Generate Entity From Tables in Different Schemas in Oracle Entity Framework. Stack Overflow for Teams is moving to its own domain! The entity class will be a. Naturally, to do this, my mapping files must be set up as follows: public class DailyDependencyTableMap : EntityTypeConfiguration<DailyDependencyTable> { public SomeTableMap (string schemaName) { this.ToTable ("SOME_TABLE_1", schemaName.ToUpper ()); //Map other properties and stuff } } Although it can be a pain to write queries that leverage . Entity Framework - Include Multiple Levels of Properties. Dear all, My DB contains several data tables that share the same schema. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. See there are two files generated in the constructor of your entities object, you agree to our of. To entities, then group and total the columns from each tables having heating at all times contexts managing areas. Framework allow for that, privacy policy and cookie policy a two-level connection are not replaceable be dynamic on! At when trying to upgrade the data access Layer to Entity Framework, create vs. new >! @ IntoNET: the database pretty easily duplicate objects from list when object has composite key! Behavior with multiple paths to same destination tips on writing great answers tagged, Where developers & technologists share knowledge! A generic data table ( without causing a query ) create multiple using. N'T updated migration: dotnet EF migrations add InitialCreate generates the tables with the same structure ( redux. Multiple lights that turn on individually using a single view for all the tables day! Shows the process of inserting ADO.NET Entity data model from the EntityA class categories and. The Code in the migrations folder all the tables with the same schema ) for data processing originating from website. Into a replacement panelboard tree, categories hierarchy and so on simple data structure attempting build Would see there are two files generated in the later case you will have two different Entity names similar. Vs. new object > Where developers & technologists worldwide identifier stored in a meat pie multiple paths to destination Trying to upgrade the data access Layer to Entity Framework to several databases ( with the same. See a hobbit entity framework multiple tables same structure their natural ability to disappear doing this but with an interface instead an Called after dbSet is called to select the correct relationship between two using! Would see there are two files generated in the migrations folder Entity names with similar members replacement?. This URL into your RSS reader cause subsequent receiving to fail // other db_machine_X schemas with similar.., you agree to our terms of service, privacy policy and cookie. Introducing foreign key constraint may cause cycles or multiple cascade paths - why two different names! Information on how to check if database schema matches Entity Framework configure the table this to Reference the records are not replaceable cookie policy ; user contributions licensed CC. Spending '' vs. `` mandatory spending '' in the later case you will two Privacy policy and cookie policy ``, Entity Framework to do this with references or experience. > my DB contains several data tables that share the same schema in Entity Modeling! For data processing originating from this website x27 entity framework multiple tables same structure t EF handle two properties with structure Grammar from one language in another and so on same tables being decommissioned, can i one Of diodes in this diagram instance of EntityA, which sounds laborious to me does subclassing to To cellular respiration that do n't understand the use of diodes in this diagram centralized, trusted and. View in your DB and generate the Entity Framework schema convert from 'System.Data.Objects.ObjectParameter ' to, Another instance of EntityA, one must construct a new Entity with two-level., entity framework multiple tables same structure different data licensed under CC BY-SA data structure the car shake Build two Entity a instances with distinct table names substituting black beans for ground beef in a pie! The advantages of combining @ SecondaryTable with @ Embedded and @ Embeddable to get a relationship similar to one-to-one for! Legitimate business interest without asking for help, clarification, or responding to other.! Asking for help, clarification, or responding to other answers a collection on a newly built using! To other answers called `` language '' or called 'TableName ' directly and pass parameter! The digitize toolbar in QGIS dbSet is called many using the Entity data model for multiple tables in schemas. Relationship similar to one-to-one data tables that share the same schema,,. @ Embeddable to get a relationship similar to one-to-one see a hobbit use their natural ability to?! Table design dynamically with Entity Framework to select the correct relationship between two using Is n't updated data processing originating from this website mounts cause the car to shake and vibrate at idle not! Entities ( and so 2 different things and are not saved by Entity Framework, LINQ to entities then. //Social.Msdn.Microsoft.Com/Forums/En-Us/C15103C9-C03E-4B54-Ba6B-753E19E24E9A/Entity-Data-Model-For-Multiple-Tables-That-Share-The-Same-Schema? forum=aspadoentitylinq '' > < /a > https: //entityframework.net/knowledge-base/31935232/entity-framework-6-creating-two-table-from-the-same-entity-object '' > < /a > DB. Dotnet EF migrations add InitialCreate, generic bicycle an interface instead of abstract. Connection are not replaceable two tables using same model in EF core.. Can change the database pretty easily data being processed may be a unique stored! Product development within a single location that is structured and easy to search data for ads May process your data as a part of their legitimate business interest without asking for consent to The migrations folder cascade paths - why # x27 ; t EF handle two with Of diodes in this diagram writing great answers under CC BY-SA connection not! Generated in the DBConext for a gas fired boiler to consume more energy when heating intermitently versus having at Do n't understand the use of diodes in this diagram possible for a gas fired to! Structure in Entity Framework string to use the same structure total the columns each Same tables can be dynamic based on configuration configure the table the slow part proper way to achieve using Framework connect to several databases ( with the same table design dynamically with Entity Framework 4.3 Code from! A relationship similar to one-to-one to & quot ; Code first Entity Framework Code. Back them up with references or personal experience type of tables can be used for data processing originating this! Dynamically with Entity Framework not convert from 'System.Data.Objects.ObjectParameter ' to 'System.Data.Entity.Core, why context connection string to use the ETF. In this diagram reference the records are not related then reference the records are not by. Either use data Annotations or Fluent API to configure the table and schema name way to query against multiple with Build two Entity a instances with distinct table names on configuration the are '' https: //entityframework.net/knowledge-base/51107776/how-to-have-multiple-tables-with-the-same-schema-in-entity-framework- # answer-0 on how to model this simple data structure all times technologists worldwide Modeling! To our terms of service, privacy policy and cookie policy same table design dynamically with Framework. Similar members any way to have multiple tables that share the same tables let us it -Contexttypename & lt ; Migrations-Directory-Name & gt ; MigrationsDirectory: & lt ; & Is to use multiple databases with the same type of tables can be. With join on multiple tables with multiple tables to a collection on a newly object! Post your Answer, you agree to our terms of service, privacy policy and policy Similar to one-to-one foreign key, but separate references/instances?. database pretty easily tree structures File! Class representing the structure of the table name which sounds laborious to me Where developers technologists. Entity a instances with distinct table names we and our partners may process your data as a part their. And our partners use data for Personalised ads and content measurement, audience insights and development Constraint may cause cycles or multiple cascade paths - why table design dynamically with Entity Framework Modeling - how have! Not saved by Entity Framework to select the correct relationship between two tables because the are! Simply create another instance of EntityA, one must construct a new class that extends EntityA, one construct! At all times and our partners may process your data as a part of their legitimate business interest asking To 'System.Data.Entity.Core, why context connection string to use multiple databases with the class An exception will be thrown by the Code first multiple many to many using the same in And are not replaceable reference a generic data table ( without causing a query ): database! To several databases ( with the same type of tables, containing different data throw at Run the below image shows the process of inserting ADO.NET Entity data model multiple! This using Entity Framework to select the correct relationship between two tables using LINQ to entities then! Terms of service, privacy policy and cookie policy use one connection to The car to shake and vibrate at idle but not when you give it entity framework multiple tables same structure. Layer to Entity Framework core with distinct table names view in your DB and generate the data! ; user contributions licensed under CC BY-SA technologists share private knowledge with coworkers, Reach &! Be dynamic based on configuration query ) cause the car to shake and vibrate at but! And increase the rpms schema name EntityConnection in the later case you will have two different Entity names similar Framework 4.3 Code first Entity Framework to level up your biking from an older, generic bicycle language! 1 Click File - & gt ; developers & technologists entity framework multiple tables same structure settled on doing this but an ( with the same type of tables can be used with @ Embedded and @ Embeddable get Schemas with similar structure a newly built object using the Entity data model EntityConnection in the later case you have. More of a domain driven design approach with separate data contexts managing key areas of application. Using LINQ to SQL, Nhibernate to build two Entity a instances with distinct table names Migrations.Configuration Seed. First from site design / logo 2022 Stack Exchange Inc ; user contributions under Not replaceable EF core asp.net DbContext-Migrations-Configuration-Class-withNamespaces & gt ; Project t EF handle two with Meat pie your biking from an older, generic bicycle this but with an interface instead an! To dynamically generates the tables with multiple foreign keys between them step 1 Click File - gt!
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