public string SelectInto <TModel>()
{
if ((CustomSelect && OnlyFields == null) || (typeof(TModel) == typeof(T) && !PrefixFieldWithTableName))
{
return(ToSelectStatement());
}
useFieldName = true;
var sbSelect = StringBuilderCache.Allocate();
var selectDef = modelDef;
var orderedDefs = tableDefs;
if (typeof(TModel) != typeof(List <object>) &&
typeof(TModel) != typeof(Dictionary <string, object>) &&
typeof(TModel) != typeof(object) && //dynamic
!typeof(TModel).IsValueTuple())
{
selectDef = typeof(TModel).GetModelDefinition();
if (selectDef != modelDef && tableDefs.Contains(selectDef))
{
orderedDefs = tableDefs.ToList(); //clone
orderedDefs.Remove(selectDef);
orderedDefs.Insert(0, selectDef);
}
}
foreach (var fieldDef in selectDef.FieldDefinitions)
{
var found = false;
if (fieldDef.BelongToModelName != null)
{
var tableDef = orderedDefs.FirstOrDefault(x => x.Name == fieldDef.BelongToModelName);
if (tableDef != null)
{
var matchingField = FindWeakMatch(tableDef, fieldDef);
if (matchingField != null)
{
if (OnlyFields == null || OnlyFields.Contains(fieldDef.Name))
{
if (sbSelect.Length > 0)
{
sbSelect.Append(", ");
}
if (fieldDef.CustomSelect == null)
{
if (!fieldDef.IsRowVersion)
{
sbSelect.Append($"{GetQuotedColumnName(tableDef, matchingField.Name)} AS {SqlColumn(fieldDef.Name)}");
}
else
{
sbSelect.Append(DialectProvider.GetRowVersionSelectColumn(fieldDef, DialectProvider.GetTableName(tableDef.ModelName)));
}
}
else
{
sbSelect.Append(fieldDef.CustomSelect + " AS " + fieldDef.FieldName);
}
continue;
}
}
}
}
foreach (var tableDef in orderedDefs)
{
foreach (var tableFieldDef in tableDef.FieldDefinitions)
{
if (tableFieldDef.Name == fieldDef.Name)
{
if (OnlyFields != null && !OnlyFields.Contains(fieldDef.Name))
{
continue;
}
if (sbSelect.Length > 0)
{
sbSelect.Append(", ");
}
var tableAlias = tableDef == modelDef // Use TableAlias if source modelDef
? TableAlias
: null;
if (fieldDef.CustomSelect == null)
{
if (!fieldDef.IsRowVersion)
{
sbSelect.Append(tableAlias == null
? GetQuotedColumnName(tableDef, tableFieldDef.Name)
: GetQuotedColumnName(tableDef, tableAlias, tableFieldDef.Name));
if (tableFieldDef.RequiresAlias)
{
sbSelect.Append(" AS ").Append(SqlColumn(fieldDef.Name));
}
}
else
{
sbSelect.Append(DialectProvider.GetRowVersionSelectColumn(fieldDef, DialectProvider.GetTableName(tableAlias ?? tableDef.ModelName)));
}
}
else
{
sbSelect.Append(tableFieldDef.CustomSelect).Append(" AS ").Append(tableFieldDef.FieldName);
}
found = true;
break;
}
}
if (found)
{
break;
}
}
if (!found)
{
// Add support for auto mapping `{Table}{Field}` convention
foreach (var tableDef in orderedDefs)
{
var matchingField = FindWeakMatch(tableDef, fieldDef);
if (matchingField != null)
{
if (OnlyFields != null && !OnlyFields.Contains(fieldDef.Name))
{
continue;
}
if (sbSelect.Length > 0)
{
sbSelect.Append(", ");
}
var tableAlias = tableDef == modelDef // Use TableAlias if source modelDef
? TableAlias
: null;
sbSelect.Append($"{DialectProvider.GetQuotedColumnName(tableDef, tableAlias, matchingField)} as {SqlColumn(fieldDef.Name)}");
break;
}
}
}
}
var select = StringBuilderCache.ReturnAndFree(sbSelect);
var columns = select.Length > 0 ? select : "*";
SelectExpression = "SELECT " + (selectDistinct ? "DISTINCT " : "") + columns;
return(ToSelectStatement());
}