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Questions - foreign-keys

EF Core Foreign Key: incompatible types

I looked through many similar questions, but I find no applicable solution. I get the following error message during tests: System.InvalidOperationException : The relationship from 'Product.FeatureTy...
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Balázs Börcsök

c#

orm

entity-framework-core

foreign-keys

ef-core-3.1

Votes: 0

Answers: 3

Latest Answer

You can model this in EF by using a value conversion. The first step is to change the type of Product.Type: public class Product { public Guid Id { get; set; } public string Name { get; set; }...
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Gert Arnold

PhpMyAdmin, aliases and foreign keys

I've done some searching on the internet but haven't be able to find an answer or solution. I'm wondering whether it is possible to apply logic within PhpMyAdmin to prevent certain users appearing in ...
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George Austin Bradley

mysql

phpmyadmin

foreign-keys

Votes: 0

Answers: 1

Latest Answer

Most developers handle this kind of business rule in application code. That is, just write your code to check a user's access_level before inserting a row for that user in the races table. If you need...
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Bill Karwin

Best way to deserialize Json with nested objects into Android Room Entity with ForeignKeys

I have a Client api. The json response looks like this: { "clientId": 1, "createdAt": null, "updatedAt": null, "monthlyPaymentAmount": null, ...
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Jesus Jimenez

kotlin

foreign-keys

android-room

json-deserialization

android-room-relation

Votes: 0

Answers: 2

Latest Answer

Will it know that it is a ForeignKey and will create a Person::class automatically? Absolutely not. @ForeignKey defines a ForeignKey constraint i.e. a rule that says that the column(s) to which the ...
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MikeT

Laravel relationship throughout multiple tables

I have a "daisy chain" of tables. I managed to get three deep table query and i'm not sure how to go about further. I got through vehicles->complement->deliveries, but i'm not sure ho...
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Veljko Stefanovic

laravel

foreign-keys

relationship

Votes: 0

Answers: 2

Latest Answer

Dot syntax is solution here. Simply "connect" models as you were connecting tables with foreign keys. But in models, you'll use relationship methods. Example: Vehicle has "Complements&q...
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Veljko Stefanovic

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