Explicit Loading in EF Core

 Explicit Loading in EF Core:

Explicit loading in EF Core allows related data to be loaded on-demand, giving full control over when and which related entities to load after the main entity has been fetched. You use Entry() with methods like .Reference() for single entities or .Collection() for collections, followed by .Load() to explicitly load related data.

This technique is ideal when related data needs to be loaded conditionally or at a later point, after retrieving the main entity. While explicit loading offers greater control over performance compared to lazy or eager loading, it should be used judiciously to avoid unnecessary queries.

 

Advantages:

  • Full Control: Load related data only when needed, avoiding unnecessary queries.
  • Avoids N+1 Problem: Provides more control than lazy loading, preventing excessive queries when accessing navigation properties in loops.

 

Disadvantages:

  • More Queries: Overuse can lead to multiple queries, potentially affecting performance.
  • Increased Complexity: Requires manual control over when related data is loaded.

 

Best Practices:

  • Load related data only when necessary to prevent performance issues.
  • Use .AsNoTracking() for read-only operations to improve performance.

 

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