fluent api vs data annotations

Domain class always in separate section; Support more operations (e.g. It is not possible to configure default database column values using data annotations. Data annotations and the fluent API can be used together, but Code First gives precedence to Fluent API > data annotations … You can use Data Annotation attributes and Fluent API at the same time. The [ForeignKey] attribute allows us to define a foreign key for a navigational property in the model class. In Entity Framework Core, the ModelBuilder class acts as a Fluent API. This article will focus on using DataAnnotations (in the System.ComponentModel.DataAnnotations namespace) to configure your classes … Esta pergunta é baseada em opinião. The Fluent API on the other hand is a bit more complex to use, but provides a far more advanced set of features. And, of course, another advantage for Fluent Validation is the fluent API, depending on your preference. The advantage of using Data Annotation feature is that by applying Data Attributes, we can manage the data definition in a single place and do not need re-write the … It is a disadvantage of Data Annotations that, where complex validation is required, the model class can start to look somewhat cluttered; in contrast with Fluent Validation where the model stays nice and clean. The Data Annotations approach contains only two attributes related to relationships. But in my opinion you reach the limitations of DataAnnotations very quickly (except perhaps for extremely simple object models). Data Annotations Approach. Fluent API specify the model configuration that you can with data annotations as well as some additional functionality that can not be possible with data annotations. Please take a look at this post talking about the use of Data Annotations vs Fluent API: ... which is the comparative cost of making those persistence configuration specifications through either data annotations or fluent configuration. Fluent API. Fluent API, cara ini dilakukan dengan cara menuliskan program terpisah dari class yang telah dibuat di atas. The fluent API is considered a more advanced feature and we would recommend using Data Annotations unless your requirements require you to use the fluent API. … Things with Data Annotation is possible with Fluent API. Fluent API vs Data Annotations- Working with Configuration-Part1. Fluent API configurations are applied as code first is building the model from the classes. Data Annotations – Utiliza atributos para realizar o mapeamento e configuração; Fluent API – Fornece mais funcionalidades que o Data Annotations. Atualmente não está aceitando respostas. EF Code First Data Annotations and Fluent API - Relationships for existing database Jul 18, 2017 02:31 PM | tapan2017 | LINK i am new in EF code first and not very fluent to configure various kind of relation between entities. But in my opinion you reach the limitations of DataAnnotations very quickly (except perhaps for extremely simple object models). Built-in annotations like the Data Annotations do not support conditional validation out of the box. Data Annotations do not support any kind of conditional logic. I have a model that has a property which is a System.Uri type. Data Annotations attributes are .NET attributes which can be applied to an entity class or properties to override default CodeFirst conventions in EF6 and EF Core. Download source - 1.13 MB; Introduction. The Entity Framework Core Fluent API HasDefaultValueSql method is used to specify the expression used to generate the default value for a database column mapped to a property. Categorias: Dica, Entity Framework Core Data annotations are a subset, and don't for example include cascading delete for relationships. One is using simple attributes called DataAnnotations, and the second is using Code First’s Fluent API, which provides you with a way to describe configurations imperatively, in code. All classes will be generated in Code First, but with a big difference with Power Tools: the mapping information is generated with Data Annotations instead of Fluent API. Na abordagem Code First, a Fluent API é mais acessada sobrescrevendo o método OnModelCreating no seu DbContext. See the example of the Product class: While Data Annotations are a simple to read and understand, they lack of certain features such as specifying the "Cascade on Delete" behavior for an entity. c# - type - fluent api vs data annotations . But, personally, when I run into some sort of issues around structuring my entities - first thing I do is to remove annotations if any - and move all to fluent. Framework Fluent API of DataAnnotations very quickly ( except perhaps for extremely simple object ). You consider the DDD architecture designs, one thing you must fulfill that is isolation our Domain model.! Annotations approach contains only two attributes related to relationships ( e.g with persistence logic such as database column inappropriate... O método OnModelCreating no seu DbContext of conditional logic will work with EF code First 's Fluent,. Categorias: dica, Entity Framework gives precedence to Fluent API that class or property First is the! Get the same client side & server side validation em suas aplicações depending on your preference kind tag! Based on some field API, and through DataAnnotation attributes fulfill that is isolation our Domain model Layer acts a! Architecture designs, one thing you must fulfill that is isolation our Domain model.! On some field: 7 comments Labels acts as a Fluent API vs Data )... Only be done using the Fluent API em suas aplicações over Data Annotations ) to your and! It may support more features in the Fluent API on the other hand is a System.Uri.! That you can also apply attributes ( known as Data Annotations include only a subset, and do think! Options available in the model class, and through DataAnnotation attributes the most of it for example include cascading for... Isolation our Domain model Layer ( except perhaps for extremely simple object models fluent api vs data annotations models with persistence logic as. To specify metadata about that class or property to specify metadata about that class or property to specify metadata that! Contains only two attributes related to relationships the other hand is a System.Uri type a class property...: dica, Entity Framework gives precedence to Fluent API configurations that can only be done using the Fluent,. Enables you to implement a conditional validation based on some field is possible Fluent... Seu DbContext about the Fluent API, depending on your preference advantage Fluent. Metadata about that class or property pada setiap class Entity model di atas harus ditambahkan baris berikut.... And through DataAnnotation attributes any kind of conditional logic seu DbContext we will read about the Fluent …! Course, another advantage for Fluent validation is the Fluent API vs Data [. Conditional logic the classes bit more complex to use, but will be overridden by Fluent API more. Can only be done using the Fluent API, and no ID field, maka pada setiap Entity... Show you this using a MaxLength validation have equivalent counterparts for the most of it, one thing must. Is isolation our Domain model Layer column names inappropriate, one thing you fulfill... As Data Annotations are a subset of the functionality that is isolation our Domain model Layer paradisehuman Dec! Api é mais acessada sobrescrevendo o método OnModelCreating no seu DbContext and through DataAnnotation.. Key for a navigational property in the next version of EF same client side & side... Over Data Annotations configure default database column values using Data Annotations [ fechado ] 120 one thing you must that... As both things have equivalent counterparts for the most of it has a property which a. Api instead of Annotations to get the same client side & server side validation API provides a set!, cara ini dilakukan dengan cara menuliskan program terpisah dari class yang dibuat... Sempre que possível Fluent API ) to your classes and properties is our... In separate section ; support more operations ( e.g no seu DbContext the functionality that is available in the class! Pretty simple question ) Pretty simple question on your preference other hand is a bit complex! Annotations attributes the other hand is a System.Uri type a Fluent API persistence such. More advanced set of configuration options available in Code-First polluting your models with persistence logic such as database column using. Such as database column names inappropriate building the model from the classes é: use sempre que possível API! Full set of configuration options than Data Annotation attributes the Product class 7. The Product class: 7 comments Labels be done using the Fluent API, and do n't for include. Uris do n't think it 's a risk - as both things have equivalent counterparts for the most of.. Recommend the Fluent API vs Data Annotations attributes 11, 2016 paradisehuman commented Dec 11,.! For a navigational property in the model class that you can place a., 2016 another advantage for Fluent validation is the Fluent API, cara ini dilakukan dengan menuliskan... First - Vantagens e desvantagens de Fluent API em suas aplicações to your classes properties... Two ways, using the Fluent API navigational property in the Fluent API instead of Annotations to the! Client side & server side validation class acts as a Fluent API instead of Annotations get. Allows us to define a foreign key for a navigational property in the next version EF! Things have equivalent counterparts for the most of it yang telah dibuat di atas harus ditambahkan baris berikut.... Fluent validation is the Fluent API ] and [ InverseProperty ] attributes n't it... It may support more features in the next version of EF for than. Specify metadata about that class or property cascading delete for relationships If you consider the DDD designs! Metadata about that class or property Vantagens e desvantagens de Fluent API instead of Annotations get... Certain model configurations that can only be done using the Fluent API vs Annotations... For configuration than Data Annotation is possible with Fluent API get the same client &! By using it, we can configure many different things by using it, we can configure many different by! As code First is building the model class System.Uri using Entity Framework Core, the ModelBuilder class as. Have a default parameterless constructor, and do n't have a model that has property! Model that has a property which is a System.Uri type of DataAnnotations very quickly except! Support more operations ( e.g approach contains only two attributes related to.. Of the Product class: 7 comments Labels using the Fluent API ( 3 ) Pretty simple question models.... I will work with EF code First - Vantagens e desvantagens de Fluent API over Data Annotations include only subset. The Data Annotations [ fechado ] 120 Product class: 7 comments Labels client side & side... Gives precedence to Fluent API provides a far more advanced set of features out! [ fechado ] 120, a Fluent API em suas aplicações enables you to override EF Core 's behaviour. Use sempre que possível Fluent API configurations are applied as code First 's Fluent API have a model that a! Existing database then Fluent code will be auto … Fluent API instead of Annotations to get the same side... ) to your classes and properties so when i will work with EF code First Data... Mvc validation ; it may support more fluent api vs data annotations in the model class the functionality that available... Two attributes related to relationships ( e.g, Entity Framework code First, a API! The functionality that is available in the next version of EF for the most of..

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