Ef core column of relation does not exist. Here is a screenshot.

Ef core column of relation does not exist 0 generates a query that includes columns that do not exist. The base class DbContext has functions to create and delete the database as well as to check for its existence. Model column was not created when I run update-database command. Could anyone help me do this using LINQ? SELECT p. How would I do the same with Entity Framework? I've got error: relation <tablename> does not exist. I want to check if a special table (entity) is existing or not. Jun 9, 2014 · (column does not exist) InnerException {"ERRO: 42703: coluna Extent1. If I was writing SQL, I could query sys. FullName); The issue is determining, within the confines of OnModelCreating, if the column exists before deciding to ignore. Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. I know I do not have any table named 'c1' and I don't think I have a column 'Index' anywhere in my code. Nov 5, 2015 · I am trying to run this query using Entity Framework in my ASP. I looked into the identifier quoting problem with the VS query generator (with the help of a Microsoft dev who really knows it), and this is a real limitation in the product. I changed above code to defaultValue: "{}", but the SQL generated by EF when running the migration still tries to update null values to ''. Ignore(c => c. Those are entities, not models. Id does not exist. CusId) ); Note that postgres table names are not case sensitive, so a table "Articles" and a table "articles" will clash. The stack is: NET Core 2, EF, PostgreSQL. You can manually configure the property's column name (), or possibly try to use the EFCore. Is it possible with an framework implementation or do I need to write custom methods? Oct 13, 2022 · This was causing Entity Framework to assume there was a relationship between the Discount and the AttendeeBadge when I removed that dependency earlier today. Despite these steps, the new migration still attempts to add the AccruedInterest column, which already exists in the database. Apr 14, 2016 · Here is more details since I had the same issue and this Question was help full: For whatever reason if you get this error: ALTER TABLE DROP COLUMN failed because column 'xxx' does not exist in table 'yyy'. "contactInfo", a. The column name can be qualified with a subfield name or array subscript, if needed. PostgresException" ist in System. ERROR: 42P01: relation "public. PostgresException (0x80004005): 42P07: relation "Owner" already exists Feb 18, 2022 · EF Core. HasMany(gs => gs. experience, a. After good 3-4h spent googling and finding little to no answers, I've disabled all triggers and then the c# script worked without any Jan 11, 2017 · Exception in thread "main" org. Do this: manually update the table in the database. I also want a concurrency token on all of my entities, so I use the modelBuilder. Dec 6, 2024 · So following up on possible cause that @Jeremy Thompson had shown me, I performed my typical migration - got my zillion errors - then ran a SELECT * on my Logs table after the migration had completed. PostgresException: '42P01: relation "tablename" does not exist' I tried putting public before my tablename, and the database name before my tablename. 0. Actually, "Articles" and "articles" are two different names. PostgresException (0x80004005): 42703: column a. Everything is working well as like EF 6. net 5 and all the packages. A Nov 14, 2017 · This successfully prevents multi user conflicts, but does not let me add new objects: PostgresException: 42703: column "xmin" of relation "Author" does not exist – halllo Commented Nov 1, 2022 at 17:42 Aug 3, 2016 · column_name. Entity(). system_settings" does not exist drop schema if exists public cascade; create schema public; create table system_settings ( setting_id s Aug 30, 2022 · Phantom shadow FKs usually indicate some relationship misconfiguration via fluent API, or like in this case, relationship created by EF Core default conventions. Aug 30, 2022 · Hey Guys. PostgresException: 42P01: relationship "ProjectState. NET Core Identity with User : IdentityUser to extend base user model with additional fields. from the SET clause: Apr 22, 2020 · I have worked on creating a custom migration method, AddColumnIfNotExists. Which used to be on my table. Mar 28, 2018 · I have a situation where the entity framework is adding a contract_id column to a contract model and the column does not exist as a property on C# model and it does not exist in the database either. It might have existed, as I can see in the ModelSnapshot file, but it was removed a long time ago. 2 Postgresql database with multiple schemas and one of the schema already has __EFMigrationsHistory table when trying Add-Migration x1 -Context YodaCo May 27, 2022 · You created table "Department" but then used table Department. "} - when I set a breakpoint I can see that the EF is trying to select User_Id column but it doesn't exist in the Cs object or the database schema. c Line: 3514 Routine: errorMissingColumn 42703: column "normalizedname" does not exist PM> If I uncomment at these lines Nov 21, 2017 · I have strange issue which I can't find solution for. adsoyad, a. Now I know Entity Framework Core prefers SQL Server but I need to have EF Core run queries in a way that is suitable for PostgreSQL. Aug 5, 2019 · Ms EF Core seems to use quotes for any query and Npgsql don't find the right object. Jun 26, 2015 · ERROR: column of relation does not exist PostgreSQL ,Unable to run insert query. Entity Framework - Invalid Column Name 'User_ID" 1. columns WHERE table_name="my_table"; I will get a list of the columns returned properly. So I'm trying to do a insert using EF Core but I get an exception such as . net core 3 to . Aug 18, 2024 · Looking at your db setup: . col = 1 is invalid. IX_ProjectState_ProjectId" doesn't exist Dec 15, 2023 · Using EF Core 8. EF would normally use LocationId for this, but since this property already exists in the CLR type and has been excluded with [NotMapped], it means EF cannot use this name. dll aufgetreten. But my connection string had password= This was somehow confusing the DB driver and postgres database was being used and not t11. 1 Jul 29, 2010 · I'm a rookies of EF so, sorry for my perhaps foolish question. productId) TABLES: Jul 1, 2015 · Works on . id, a. If you're using EF Core then -IgnoreChanges is not an available parameter, you need to create an initial migration with an empty Up() method and apply it to create a baseline snapshot : Add-Migration InitialCreate Update-Database Add your changes to your model class i. query the INFORMATION_SCHEMA. Database tables Mar 23, 2020 · You're calling the MigrateAsync method, but your project doesn't have any actual migrations (those can be created with dotnet ef migrations add <name>. NET Core to insert the data, and it was Jun 18, 2015 · which fails with "ERROR: 42703: column Extent1. So maybe it was "Post column" instead of "Posts column" or "Blog Array" instead of "Blog Table"? – Jun 3, 2016 · I've also gotten this problem in my EF one-many deals where the one has a List of the many property and my mapping didn't specify that property. Feb 26, 2012 · What he is saying is that entity. Mar 23, 2020 · @weitzhandler unfortunately, VS is quite limited (and problematic) in its support of non-SQL Server databases. windows-x64\src\backend\parser\parse_relation. Name properties correctly. . Manually running those statements without the quotes works fine. 0 RC1. Facing Issue Npgsql. price does not exist" Another example from modified LINQ query SELECT "Alias1". Asking for help, clarification, or responding to other answers. Entity<ParkingSpot>() . "table1" AS "Alias1" LIMIT 1 ERROR: 42703: column Alias1. Private. id doesn't exist. WithMany() // <--- . So, the solution is to simply remove temp. May 23, 2021 · Hi I have upgraded my appln from . Metadat Nov 1, 2020 · If the database says it can’t find a column and you don’t see any typos in your SQL query, you may just have a hidden character in a column name. You need a custom MigrationOperation class: public class AddColumnIfNotExistsOperation : MigrationOperation { public readonly string Table; public readonly string Name; public readonly ColumnModel ColumnModel; public AddColumnIfNotExistsOperation(string table, string name, Func<ColumnBuilder, ColumnModel> columnAction May 30, 2019 · I'm a bit new to Entity Framework Core. Continent". I have looked at this solution: Entity Framework check if May 17, 2022 · This is the proper way to do it, you could even throw the check away since the db will always throw, and just handle the "duplicate key" exceptions on purpose, just make sure proper constraints are in place. , you don’t add any new properties), Entity Framework 6 (EF6) will ignore any new columns that exist in the database but are not represented in the entity. I've used dotnet ef migrations add InitializeMigration to add new migration and after it I wanted to update my database, so I've used dotnet ef database update but Postgres throw an Exception: Npgsql. I want to make a single DbContext to work with both SQL Server and Postgres using the approach described in the EF Core documentation. It's working ok in 3. PostgresException : 42P01: relation "public. postgresql. EF Core doesn't automatically create the database schema for you - if you read this somewhere, can you please point to where that is? Dec 7, 2021 · @ygoe LocationId1 is created as a shadow property to act as the foreign key in a relationship that exists in your model. Nov 1, 2022 · We've migrated away from using an incrementing ID column on the User table to generating the IDs in the Resource table and then a foreign key relationship to it. I have reproduced the same problem using the SQL Query tool from PgAdmin. Do not include the table's name in the specification of a target column — for example, UPDATE tab SET tab. The problem is, I initially ran into: “column “[column name]” does not exist”. SqlException: Invalid column name 'UsersUserId'. Go to Server Explorer (2) Tables; Double click 'yyy' Add: new column of 'xxx' Jul 29, 2018 · probably appuser model is created by extending another POCO model. 4 Leverages HashSet for key lookup, which reduces time complexity from ~ O(entities*existingEntities) of the base version to around O(entities) Executes only one transaction, for what it's worth Npgsql. ThenInclude(e => e. I removed it because it was not longer necessary. This is the moment where the exception happens. Metadata) . But, one thing missing with __EFMigrationsHistory table, there should be a column 'Model' to store binary data of migration. productId <> '14' AND NOT EXISTS (SELECT 1 FROM SimilarProducts sp WHERE sp. Aug 12, 2016 · I want to migrate all classes and create new database. NET MVC C# and I found the following problem and I really don't know if I'm doing it right or not, it turns out that I create a database with Code First in an API project, but now I'm using the same database of data in a web project creating the model with Entity Framework, I don't want to mix the two projects. All(t => e. HasOne(p => p. Aug 30, 2022 · I'm working with ASP. relationship == null (or should), so entity. Nov 4, 2019 · I have upgraded to Entity Framework Core 3. Postgres folds all non-doubled quoted ("") identifiers to lower case (as opposed to the SQL Standard of folding them to uppercase) but keeps the exact case when identifiers are double quoted. Entity detail GenericInformation keys GKey_K Feb 15, 2017 · Connect to the database using psql, and do "\d table_name" for all of the tables. I've 2 entities without any relationship (VS does not load the join and I can't manually add it because the primary key of the child uses a derivated key of its parent). Customers . PostgreException: '42703' Column c1. Sep 16, 2020 · Upgrading from 3. For example take: public class Notification { public long ID { get; set; } public IList<NotificationRecipient> Recipients { get; set; } } Mar 25, 2021 · Removing . 0 and I am facing the below exception when I tried to get the result as "AsQueryable()"and then take particular items. What you want is something like the following: db. Planos_Id não existe"} System. enterpriseID = '00000000000191' and p. For example, if your column name had a space in it, you wouldn't be able to write WHERE the date > '2022-08-01' , but you would be able to write WHERE "the date Jul 6, 2019 · I am working with EF Core in Code-First approach. I found out by copying the Discount class to another class, and then re-mapping my entities until I found the culprit causing my issue. columns to see if the columns exist and adjust my sql accordingly. Entity master Products keys GKey_K, Product_K fields . This is probably because It's impossible to create database entities (tables, functions) and then use them in the same multi-query command (github issue: #1 , #2 ). One of the tables generated by EF migrations has an additional column that does not exist in my model. Index does not exist when I try to load a hierarchy of classes. NET property name, so it generates SQL expecting an Id column in the database, but your actual column name is id. Aug 29, 2017 · "VERSION_INFO" is a custom table which I am creating & later, in the same transaction, inserting values into it. PSQLException: ERROR: column "continent" does not exist Hint: Perhaps you meant to reference the column "countries. Example. I created tables in pgAdmin 4 and used . HasIndex(gs => gs. Not sure what generated the graph above and if it can be trusted when it comes to details of table column names. Sep 2, 2016 · I'm using entity framework that needs to be run against slightly different schemas of a database. CreateTable( name: "Owners", columns: t Aug 15, 2017 · EF Core is code based ORM, with the most important here being the M - Mapper. Model. So, or Npgsql supports object names with quotes or avoid EF Core to use quotes PostgresException: 42703: column "UsersId" of relation "Owners" does not exist "UsersId" that field is nowhere to be found in code. PostgresException: '42P01: relation "buyer" does not exist' I've decided to test it once again on console, using the exact same INSERT statement, and again, it worked as it should have from the start. Provide details and share your research! But avoid …. MoveNext()--- End of stack trace from previous location where exception was thrown --- Sep 8, 2022 · From what I understand the tables and relations should be created when I first run the program. That is not how usually databases work and definitely not how EF core ORM works. Applied the migration using dotnet ef database update. Where(c => !db. Exception {Npgsql. ParkingUser) . Question) begs the question: does this "Options" table exist, and does it in fact have a "Question" navigation property ? Please also show us the Options class, and how it is set up in EF initialization code – Nov 7, 2023 · French: 42P07: la relation « __EFMigrationsHistory » existe déjà; English: 42P07: the relation « __EFMigrationsHistory » already exists; It sounds to me, according the the first select, and because the table "__EFMigrationsHistory" already exists THAT'S the first parameter "1" that sounds like not being replaced by the appropriate value. May 15, 2015 · ERROR: relation "replays" does not exist SQL state: 42P01 I looked through the manual but did not find anything very helpful, though I suspect it may have to do with search_path somehow. However, I get the following error: Npgsql. Works on local environment but fails in production on heroku. PlaceId). Turns out that Entity Framework will assume that any class that inherits from a POCO class that is mapped to a table on the database requires a Discriminator column, even if the derived class will not be saved to the DB. Here is a chart database: Model: public class VipClient { public long Id { get; set; } public virtual Client Client { get; set; } public Feb 8, 2021 · I'm using EF Core Code First. Dec 27, 2023 · By default, EF maps column names to the exact . Sep 14, 2022 · Error: Npgsql. It may not be the zero-width space causing the problem, but it couldn’t hurt to take a look at the table definition (ie. Entity<GroceryStore>(gs => { gs. Include(e => e. Feb 4, 2024 · This of course does not work since an empty json column requires at least '{}', '' is not a valid value. Sep 6, 2022 · I receive an Exception: Npgsql. Either the table is not created or the generated SQL statement is missing something. CusId) . auto\postgres. A Foreign Key is a column or combination of columns that are used to establish and enforce a link between the data in those two tables. The simplified model which is created by EF looks like this (I use DB first approach): pub Oct 7, 2020 · Just use [NotMapped] for your 2 new properties that don't exist in this table. d__148. accountstatusid1, a. We use the Code-First EF approach to generate migration scripts and the subsequent DB schema. GetEntityTypes(). Command[20102] Failed The strange and erratic behaviour seen here, and discussion in the comments, suggests that the system catalogs (in the pg_catalog schema) may've been modified directly - perhaps an attempt to REVOKE some permissions. WithOne(o => o. If it does not exist we wish to invoke the Fluent API ignore command: modelBuilder. EntityFrameworkCore. accountid = @__accountId_0 LIMIT 2 Nov 17, 2020 · Setup Asp. And then show us the output. relationship should not be created. The relationship of Player to Universe comes in. modelBuilder. PostgresException (0x80004005): 42P01: relation "XXX" does not Feb 27, 2021 · Position: 79 File: d:\pginstaller_13. So if you do experience similar troubles, please double check your code and ask someone else to do it, there is no magic! I can't upvote now, so soadyp, Gert Arnold - thank you for your will to help! May 1, 2018 · Output showed that database name which was actually being used was postgres and not t11 Why? Because, my postgres user was configured to not use password. NET core website 2. "Id", "Alias1". EnsureCreated instead, see this doc page . the model becomes simply Aug 1, 2022 · This is probably the most common reason to get a "column does not exist" error: using double quotes. Those are not the same. For the main problem you can not do much unless you distribute-lock the code ( assuming you control all calls ). specialties FROM antrenorler AS a on my database but (pgadmin4) keeps saying that the column a. H Feb 21, 2023 · In relational databases, a relationship exists between two tables through foreign keys. i have "UserId" Help me to understand migration: migrationBuilder. Jun 29, 2023 · PostgreSQL is an RDBM system that is used for creating databases that store data in tabular form. E. It's Id, not ID, not sure if EF Core picks it up by convention if you leave it ID. I have a hard time imagining a situation where people want to snake_case only columns but not tables as part of a gradual migration (but am open to hear otherwise!). gsql. Solution 1: Jun 7, 2017 · My comments were based on what needs to be done to make sure that the column is generated but EF does not look for it in the database part of the OP. Previous versions did not have this problem. Nov 6, 2021 · Ein Ausnahmefehler des Typs "Npgsql. I have written a query using "Union" inside the select of objects. 1 is throwing "Include has been used on non entity queryable" exception. Books . Contains(c. Then add a new migration for Jun 19, 2019 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. add the PostalCode to your model. When EF looks into Player later. util. Entity framework Core supports three types of relationships; One-to-Many; One-to-One; Many-to-Many; One-to-Many Relationship Oct 4, 2017 · We're writing a new version of our application in asp. How can I prevent EF Core from trying to add this column again? Sep 27, 2020 · I already created the table using Entity Framework in another program. Jan 14, 2018 · But it is not specified in the Fluent API that Player must be attached to a server. Don't name your entities with Model suffix. Select(b => b. name FROM account AS a WHERE a. 0+ allows you to hide the join entity (it still exists, but is maintained implicitly) and model the relationship with the so called skip navigations, which are the natural OO way of representing such relationship, e. accountstatusid, a. 0 Postgres 15. I use . I have tried adding the right column name to this property, but this also did not work: Jun 7, 2019 · Also Blog table can not have a Posts column. It's misleading. accountstatusid1 does not exist Generated Query SELECT a. EntityframeworkCore. IsUnique(); gs. EF6 postgresql database first, can't generate PostgreSQL 我一直遇到“relation 不存在”的错误 在本文中，我们将介绍在使用PostgreSQL数据库时经常遇到的错误之一：“relation 不存在”。 我们将解释这个错误的原因，提供一些可能导致这个错误的常见情况，并给出解决这个问题的一些示例。 Mar 30, 2017 · Why is EF adding this column to its query and how do I fix it? As requested here is the class that contains subscriberID: public class SubscriberTag { public long ID { get; set; } public long subscriberID { get; set; } public int tagID { get; set; } public Subscriber Subscriber { get; set; } public Tag Tag { get; set; } } May 5, 2023 · It seems ef core expects that I know to always use "Values" as the column name in this instance. If you're just playing around, you likely want to call dbContext. e. The first ServerID is created to maintain the relationship. 1 to 5. 2 and EF Core 2. HasForeignKey i guess than that the problem isn't here but maybe you have another Entity (StepActin) added to the DBContext mapping, and that's the one generating the problem. I have already combed the database and the solution for any reference to 'contract_id' and I am scratching my head for this one. The way I understand it, OP expects something like SQL SELECT query column expression (or logical equivalent of a database view). However Articles and articles are the same. VeganItems May 23, 2011 · I'm using the Entity Framework with Code First approach. Nov 27, 2023 · Entity Framework Core runs this SQL query: SELECT a. While using npg package as your data store ORM you are expecting the ORM framework (Entity Framework in our case) to generate the sql statement you might face a PostgreSQL exception the relation 'Table Name' does not exist. For example, Order Model class, public class Order { [NotMapped] public string NewProperty1 { get; set; } [NotMapped] public string NewProperty2 { get; set; } } The stack is: NET Core 2, EF, PostgreSQL. Options). Entity Framework Core 3. 3 The minimal sample repro code: var tags = new List<string> { "drama" }; var records = dbContext. Dec 9, 2021 · We have a column that may or may not exist on a table. 1 and previous versions. Here is a screenshot. I have a postgresql db with a number of tables. I am trying to read a list of products from the db using entity framework core. Where(e => tags. PostgresException: 42703: column "year" does not exist at Npgsql. NET MVC project but I am not succeeding. accountid, a. The name of a column in the table named by table_name. NamingConventions if the naming translation is systematic snake-case, for example. net core, that requires us to connect to an existing PostgreSQL database (we have no control over this database and it has not changed in years Mar 5, 2020 · “Column [column name] of relation [table name] does not exist”— that’s as straightforward explanation as you can get, a SQL statement sent to dapper tried to access a non-existing column. entity. Below is a minimal example to reproduce the problem. Apr 7, 2022 · Ask a question. If I try to AddMigration I see that EF Core will add a column called MainImageId1 and put a foreign key in place to the Images table. Jun 27, 2024 · Generated a new migration using dotnet ef migrations add AddColumnsToPortfolio. Aug 3, 2017 · Exception: Unhandled Exception: Npgsql. NpgsqlException} This is the code generated by Npgsql Apr 10, 2024 · If you don’t make changes to the entity class (i. And thought that the culprit was again, a non-existing column Oct 26, 2021 · Issue : constraint "FK_DestinationsLists_Regions_AirportCode" of relation "DestinationsLists" does not exist fail: Microsoft. It doesn't matter what the actual database structure is, the important is what EF *thinks** it is based on your code model (entity classes and their properties, combined with data annotations, fluent configuration and set of conventions). It is what it is, but I dug through the docs and didn't find any help with this unfortunately ☹️ Initially the column on the query was timestamp , but I changed it to Value after seeing the generated query. Oct 29, 2020 · "Id" integer NOT NULL GENERATED BY DEFAULT AS IDENTITY, reputation integer NOT NULL, user_id integer NOT NULL, user_type text NULL, profile_image text NULL, display_name text NULL, link text NULL, accept_rate integer NULL, CONSTRAINT "PK_Owner" PRIMARY KEY ("Id")); Npgsql. "XXX" column does not exist in SQL. Note that Single navigation property in one of the entities is enough to imply relationship in the model. 0 with Npgsql 8. similarId = p. I am using the latest version 2. After I create first migration, drop whole database and try to dotnet ef database update I always get an error: 42P07: relation "AspNetRoles" already exists Oct 28, 2021 · Yea, but now (as far as I know) you can make many-to-many relationships, without specifying join entity (in this case BlogPost), EFCore will take care about that and make join table in database. my db is in postgres It happens when i try to &quot;Include&quot; the products images … Nov 30, 2022 · If a table references a composite unique constraint, EF Core 7. If I query: SELECT column_name FROM information_schema. Trace, true, true); there is the following INSERT statement logged: Sep 25, 2011 · I'm trying to retrieve the VideoCollection items from the database, but getting {"Invalid column name 'User_Id'. This entity does not have any complex object apart from the identity user and all other properties are primitive. property should throw a Null Reference Exception because he will be trying to access properties of relationship, when relationship is null – Apr 1, 2024 · Here // Relationship between ParkingSpot and ParkingUser (CreatedBy) modelBuilder. (It does exist in another table but that shouldn't matter). Note: After verification I had a column "Index" in a class persisted by EF Core. The second ServerId1 is then used to keep the 1-to-1 relationship. : '42703: column "Created" of relation "posts" does not exist When set NpgsqlLogManager. Npgs Nov 8, 2016 · I am trying to add to the data base VipClient. Provider to new ConsoleLoggingProvider(NpgsqlLogLevel. For __EFMigrationHistory specifically, I have to investigate since this table has a specific meaning to EF Core, and I'm not sure how flexible things are there. * FROM Produtos p WHERE p. HasForeignKey("Id") made it work. In PostgreSQL, tables are also referred to as relations. Position: 8 The query that has been run is the following: Mar 9, 2020 · The issue When I run this sql in one command I get Npgsql. Steps I followed : Created a table named "USER" in Oracle using Toad , with following DDL statement; CREATE TABLE POLICYAPP. Aug 13, 2021 · No need to use Key or Column. HasMany(q => q. AspNetUsers" does not exist. EF Core handles that by default if default approach is what you need (in this case it is). Blacklists . COLUMNS table) to find out. In PostgreSQL, double quotes aren't used for strings, but rather for identifiers. Net 8 and EF Core 8. In one database a column does not exist,but in another it is a required (not null) field. Database. 0 for migration, creating tables, relationships, etc. "price" FROM "schema1". g. PostgresException (0x80004005): 42P01: relation «companies» does not exist at Npgsql. NpgsqlConnector. Feb 3, 2020 · Now every time a SELECT happens on the Assets table, it is trying to select the column MainImageId1, which doesn't exist. CoreLib. I. Tags) . 1 , EF Core and Oracle. I face the problem that EF creates a column in the query that does not exist in the Oracle database table. USER { ID NUMBER GENERATED BY DEFAULT AS IDENTITY, USERNAME VARCHAR2(10) NOT NULL, PASSWORDHASH VARCHAR2(30) NOT NULL PRIMARY KEY(ID) }; PostgreSQL EF Core 表不存在 在本文中，我们将介绍 PostgreSQL EF Core 中的 'Relation doesn't exist' 错误以及如何处理此错误。 阅读更多：PostgreSQL 教程 什么是 'Relation doesn't exist' 错误？ 在使用 PostgreSQL 数据库时，当我们执行查询或操作某个表时，有时会遇到 'Relatio Aug 10, 2021 · EF Core 5. May 5, 2021 · I am using Dot Net Core 3. – Apr 22, 2013 · To all who are new to EF and are falling in the same cave I'll leave a note: EF can't "remember" some properties unless it has reference to it. relationship. Migrations just not work. kqxc ytrp fnnsam rztse zsury bpnrcmn azn sbizxwjx elufu rcmikct vihw gghf dsda erdm lck