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Generate HasPrincipalKey on relationship if necessary #575

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Generate HasPrincipalKey on relationship if necessary #575

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24 changes: 24 additions & 0 deletions src/EntityFrameworkCore.Generator.Core/Templates/MappingClassTemplate.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -224,6 +224,30 @@ private void GenerateRelationshipMapping(Relationship relationship)
}
CodeBuilder.Append(")");

var primaryKeys = relationship.PrimaryProperties;
var nonPrimaryPrincipalKey = !primaryKeys
.Select(pp => relationship.PrimaryEntity.Properties.ByProperty(pp.PropertyName))
.All(p => p.IsPrimaryKey ?? true);
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Unsure what IsPrimaryKey == null would mean, so I used ?? true so it would not generate the .HasPrincipalKey stuff in that case. There may be other corner-cases I haven't considered as well.


if (nonPrimaryPrincipalKey)
{
CodeBuilder.AppendLine();

CodeBuilder.Append(".HasPrincipalKey(t => ");
if (primaryKeys.Count > 1)
{
CodeBuilder.Append("new { ");
CodeBuilder.Append(string.Join(", ", primaryKeys.Select(pp => $"t.{pp.PropertyName.ToSafeName()}")));
CodeBuilder.Append(" }");
}
else
{
var propertyName = primaryKeys.First().PropertyName.ToSafeName();
CodeBuilder.Append($"t.{propertyName}");
}
CodeBuilder.Append(")");
}

if (!string.IsNullOrEmpty(relationship.RelationshipName))
{
CodeBuilder.AppendLine();
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