protected virtual IEnumerable <MigrationOperation> Diff(
IEntityType source,
IEntityType target,
ModelDifferContext diffContext)
{
var sourceExtensions = MetadataExtensions.Extensions(source);
var targetExtensions = MetadataExtensions.Extensions(target);
var schemaChanged = sourceExtensions.Schema != targetExtensions.Schema;
var renamed = sourceExtensions.Table != targetExtensions.Table;
if (schemaChanged || renamed)
{
yield return(new RenameTableOperation
{
Schema = sourceExtensions.Schema,
Name = sourceExtensions.Table,
NewSchema = schemaChanged ? targetExtensions.Schema : null,
NewName = renamed ? targetExtensions.Table : null
});
}
diffContext.AddMapping(source, target);
var operations = Diff(source.GetPropertiesInHierarchy(), target.GetPropertiesInHierarchy(), diffContext)
.Concat(Diff(source.GetKeys(), target.GetKeys(), diffContext))
.Concat(Diff(source.GetIndexesInHierarchy(), target.GetIndexesInHierarchy(), diffContext));
foreach (var operation in operations)
{
yield return(operation);
}
}
protected virtual IEnumerable <MigrationOperation> Diff(
IEnumerable <IProperty> source,
IEnumerable <IProperty> target,
ModelDifferContext diffContext)
=> DiffCollection(
source,
target,
(s, t) =>
{
diffContext.AddMapping(s, t);
return(Diff(s, t));
},
t => Add(t),
Remove,
(s, t) => string.Equals(s.Name, t.Name, StringComparison.OrdinalIgnoreCase),
(s, t) => string.Equals(
MetadataExtensions.Extensions(s).Column,
MetadataExtensions.Extensions(t).Column,
StringComparison.OrdinalIgnoreCase));