public when_doing_a_schema_diff_with_no_changes_95_style()
{
var store1 = TestingDocumentStore.For(_ =>
{
_.DatabaseSchemaName = Marten.StoreOptions.DefaultDatabaseSchemaName;
_.Schema.For <User>().Duplicate(x => x.UserName).Duplicate(x => x.Internal);
});
store1.Schema.EnsureStorageExists(typeof(User));
// Don't use TestingDocumentStore because it cleans everything upfront.
store2 = DocumentStore.For(_ =>
{
_.Connection(ConnectionSource.ConnectionString);
_.DatabaseSchemaName = Marten.StoreOptions.DefaultDatabaseSchemaName;
_.Schema.For <User>().Duplicate(x => x.UserName).Duplicate(x => x.Internal);
});
mapping = store2.Schema.MappingFor(typeof(User)).As <DocumentMapping>();
diff = mapping.SchemaObjects.As <DocumentSchemaObjects>().CreateSchemaDiff(store2.Schema);
}
/// <summary>
/// compares the schemas of the two data tables, and returns any differences. The master datatable must have primary
/// keys to be comparable.
/// </summary>
/// <returns></returns>
public ReturnValue<SchemaDiff> CompareSchema()
{
if (!_master.PrimaryKey.Any())
{
return ReturnValue<SchemaDiff>.FailResult("Primary key is missing.");
}
var diff = new SchemaDiff { IsCompatible = true };
if (MissingFieldNames.Any())
{
diff.ColumnDiffs.AddRange(MissingFieldNames.Select(name => new ColumnDiff
{
Column = _master.Columns.Cast<DataColumn>().First(col => col.ColumnName == name),
DiffType = DiffType.Missing
}));
diff.IsCompatible = false;
}
diff.ColumnDiffs.AddRange(ExtraFieldNames.Select(
colName => new ColumnDiff
{
Column = _replica.Columns.Cast<DataColumn>().First(col => col.ColumnName == colName),
DiffType = DiffType.Extra
}));
// naive type checking - an difference in type breaks compatibilty.
IEnumerable<ColumnDiff> diffCols =
from masterCol in _master.Columns.Cast<DataColumn>()
join repCol in _replica.Columns.Cast<DataColumn>() on masterCol.ColumnName equals repCol.ColumnName
where masterCol.DataType != repCol.DataType
select new ColumnDiff
{
DiffType = DiffType.TypeMismatch,
Column = repCol
};
if (diffCols.Any())
{
diff.IsCompatible = false;
diff.ColumnDiffs.AddRange(diffCols);
}
return ReturnValue<SchemaDiff>.SuccessResult(diff);
}