public HasIndexFluent HasIndex(Expression <Func <T, object> > index)
{
var exp = index?.Body;
if (exp?.NodeType == ExpressionType.Convert)
{
exp = (exp as UnaryExpression)?.Operand;
}
if (exp == null)
{
throw new ArgumentException(DbContextStrings.ParameterError_CannotBeNull("index"));
}
var indexName = $"idx_{Guid.NewGuid().ToString("N").Substring(0, 8)}";
var columns = new List <string>();
switch (exp.NodeType)
{
case ExpressionType.MemberAccess:
columns.Add((exp as MemberExpression).Member.Name);
break;
case ExpressionType.New:
foreach (var member in (exp as NewExpression).Members)
{
columns.Add(member.Name);
}
break;
}
_tf.Index(indexName, string.Join(", ", columns), false);
return(new HasIndexFluent(_tf, indexName, columns));
}
public HasIndexFluent HasIndex(Expression <Func <T, object> > index)
{
if (index?.Body == null)
{
throw new ArgumentException("参数错误 index 不能为 null");
}
var exp = index.Body;
var indexName = $"idx_{Guid.NewGuid().ToString("N").Substring(0, 8)}";
var columns = new List <string>();
switch (exp.NodeType)
{
case ExpressionType.MemberAccess:
columns.Add((exp as MemberExpression).Member.Name);
break;
case ExpressionType.New:
foreach (var member in (exp as NewExpression).Members)
{
columns.Add(member.Name);
}
break;
}
_tf.Index(indexName, string.Join(", ", columns), false);
return(new HasIndexFluent(_tf, indexName, columns));
}
public HasIndexFluent HasIndex(string index)
{
if (index == null)
{
throw new ArgumentException(DbContextStrings.ParameterError_CannotBeNull("index"));
}
var indexName = $"idx_{Guid.NewGuid().ToString("N").Substring(0, 8)}";
var columns = new List <string>();
foreach (string name in index.Split(','))
{
if (string.IsNullOrEmpty(name.Trim()))
{
continue;
}
columns.Add(name.Trim());
}
_tf.Index(indexName, string.Join(", ", columns), false);
return(new HasIndexFluent(_tf, indexName, columns));
}
public HasIndexFluent IsUnique()
{
_isUnique = true;
_modelBuilder.Index(_indexName, string.Join(", ", _columns), _isUnique);
return(this);
}