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How to Fix: Automapper missing type map configuration or unsupported mapping - Error
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📋 Table of Contents
The "Automapper missing type map configuration or unsupported mapping" error typically occurs when Automapper is unable to create a mapping between two types. In this case, the issue lies in the navigation property `CategoryPositions` on the `Categoies` entity.
⚠️ Common Causes
- Missing or incorrect navigation property configuration in the `Categoies` entity.
🛠️ Step-by-Step Verified Fixes
Method 1: Configure Navigation Property
- Step 1: Update the `Categoies` entity to include a navigation property configuration for `CategoryPositions`:
public partial class Categoies : IHasNavigation <CategoryPositions> { public virtual CategoryPositions CategoryPositions { get; set; } // ... }Method 2: Specify Custom Mapper for Navigation Property
- Step 1: Create a custom mapper for the `CategoryPositions` navigation property using Automapper:
public static void ConfigureMapper() { var builder = new EntityTypeBuilder<Categoies>(); builder.HasNavigation<CategoryPositions>(m => m.To.<CategoryPositions>());}✨ Wrapping Up
By applying these fixes, you should be able to resolve the "Automapper missing type map configuration or unsupported mapping" error and successfully configure your entity mappings.
❓ Frequently Asked Questions
Missing or incorrect navigation property configuration in the `Categoies` entity.
Step 1: Update the `Categoies` entity to include a navigation property configuration for `CategoryPositions`:
Step 1: Create a custom mapper for the `CategoryPositions` navigation property using Automapper:
By applying these fixes, you should be able to resolve the "Automapper missing type map configuration or unsupported mapping" error and successfully configure your entity mappings.