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InverseNavigationResolver.cs
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InverseNavigationResolver.cs
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using JetBrains.Annotations;
using JsonApiDotNetCore.Repositories;
using JsonApiDotNetCore.Resources.Annotations;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Metadata;
namespace JsonApiDotNetCore.Configuration;
/// <inheritdoc cref="IInverseNavigationResolver" />
[PublicAPI]
public sealed class InverseNavigationResolver : IInverseNavigationResolver
{
private readonly IResourceGraph _resourceGraph;
private readonly IEnumerable<IDbContextResolver> _dbContextResolvers;
public InverseNavigationResolver(IResourceGraph resourceGraph, IEnumerable<IDbContextResolver> dbContextResolvers)
{
ArgumentGuard.NotNull(resourceGraph);
ArgumentGuard.NotNull(dbContextResolvers);
_resourceGraph = resourceGraph;
_dbContextResolvers = dbContextResolvers;
}
/// <inheritdoc />
public void Resolve()
{
foreach (IDbContextResolver dbContextResolver in _dbContextResolvers)
{
DbContext dbContext = dbContextResolver.GetContext();
Resolve(dbContext);
}
}
private void Resolve(DbContext dbContext)
{
foreach (ResourceType resourceType in _resourceGraph.GetResourceTypes().Where(resourceType => resourceType.Relationships.Any()))
{
IEntityType? entityType = dbContext.Model.FindEntityType(resourceType.ClrType);
if (entityType != null)
{
IDictionary<string, INavigationBase> navigationMap = GetNavigations(entityType);
ResolveRelationships(resourceType.Relationships, navigationMap);
}
}
}
private static IDictionary<string, INavigationBase> GetNavigations(IEntityType entityType)
{
// @formatter:wrap_chained_method_calls chop_always
return entityType.GetNavigations()
.Cast<INavigationBase>()
.Concat(entityType.GetSkipNavigations())
.ToDictionary(navigation => navigation.Name);
// @formatter:wrap_chained_method_calls restore
}
private void ResolveRelationships(IReadOnlyCollection<RelationshipAttribute> relationships, IDictionary<string, INavigationBase> navigationMap)
{
foreach (RelationshipAttribute relationship in relationships)
{
if (navigationMap.TryGetValue(relationship.Property.Name, out INavigationBase? navigation))
{
relationship.InverseNavigationProperty = navigation.Inverse?.PropertyInfo;
}
}
}
}