protected override SqlBuilder Join(UnaryExpression expression, SqlBuilder sqlBuilder)
{
//解析x => !x.isDeletion这样的
if (expression.NodeType == ExpressionType.Not && expression.Operand is MemberExpression && expression.Type == typeof(bool))
{
var dbParamName = sqlBuilder.AddDbParameter(0);
var memberExpression = expression.Operand as MemberExpression;
//添加到关联条件
var tableName = memberExpression.Member.DeclaringType.GetTableName(sqlBuilder._dbSqlParser);
sqlBuilder.SetTableAlias(tableName);
string tableAlias = sqlBuilder.GetTableAlias(tableName);
if (!string.IsNullOrWhiteSpace(tableAlias))
{
tableAlias += ".";
}
sqlBuilder.SqlJoinStr += " " + tableAlias + memberExpression.Member.Name;
sqlBuilder.SqlJoinStr += " = ";
sqlBuilder.SqlJoinStr += $"{dbParamName}";
}
else
{
SqlProvider.Join(expression.Operand, sqlBuilder);
}
return(sqlBuilder);
}
private SqlQueryable <T> JoinParser2 <T2, T3>(Expression <Func <T2, T3, bool> > expression, string leftOrRightJoin = "")
{
if (expression == null)
{
throw new ArgumentNullException("expression", "Value cannot be null");
}
string joinTableName = typeof(T3).GetTableName(_sqlBuilder._dbSqlParser);
this._sqlBuilder.SetTableAlias(joinTableName);
this._sqlBuilder.SqlJoinStr += $"{leftOrRightJoin} join {joinTableName + " " + this._sqlBuilder.GetTableAlias(joinTableName)} on";
SqlProvider.Join(expression.Body, this._sqlBuilder);
return(this);
}
protected override SqlBuilder Join(BinaryExpression expression, SqlBuilder sqlBuilder)
{
bool hasHandle = false;
if (CheckMemberIsNotColumn(expression, sqlBuilder))
{
return(sqlBuilder);
}
//添加二元表达式左侧sql
if (expression.Left is MemberExpression && expression.Left.Type == typeof(bool) && expression.Left.NodeType == ExpressionType.MemberAccess && (expression.NodeType == ExpressionType.AndAlso || expression.Right is ConstantExpression))
{
//解析（m=>m.IsAdmin)
var memberExpression = expression.Left as MemberExpression;
var tableName = memberExpression.Member.DeclaringType.GetTableName(sqlBuilder._dbSqlParser);
sqlBuilder.SetTableAlias(tableName);
string tableAlias = sqlBuilder.GetTableAlias(tableName);
if (!string.IsNullOrWhiteSpace(tableAlias))
{
tableAlias += ".";
}
var dbParamName = string.Empty;
if (expression.Right is ConstantExpression)
{
hasHandle = true;
var value = Convert.ToBoolean(((ConstantExpression)expression.Right).Value) ? 1 : 0;
dbParamName = sqlBuilder.AddDbParameter(value);
}
else
{
dbParamName = sqlBuilder.AddDbParameter(1);
}
//添加关联条件
sqlBuilder.SqlJoinStr += " " + tableAlias + memberExpression.Member.Name;
sqlBuilder.SqlJoinStr += " = ";
sqlBuilder.SqlJoinStr += $"{dbParamName}";
}
else
{
SqlProvider.Join(expression.Left, sqlBuilder);
}
if (!hasHandle)
{
//添加二元表达式操作符
var joinOperator = " =";
if ((expression.Right is ConstantExpression) && ((ConstantExpression)expression.Right).Value == null)
{
joinOperator = OperatorParser(expression.NodeType, true);
}
else
{
joinOperator = OperatorParser(expression.NodeType);
}
sqlBuilder.SqlJoinStr += $"{joinOperator}";
//添加二元表达式右侧sql
if (expression.Right is MemberExpression && expression.Right.Type == typeof(bool) && expression.Right.NodeType == ExpressionType.MemberAccess && expression.NodeType == ExpressionType.AndAlso)
{
//解析（m=>m.IsAdmin)
var memberExpression = expression.Right as MemberExpression;
var tableName = memberExpression.Member.DeclaringType.GetTableName(sqlBuilder._dbSqlParser);
sqlBuilder.SetTableAlias(tableName);
string tableAlias = sqlBuilder.GetTableAlias(tableName);
if (!string.IsNullOrWhiteSpace(tableAlias))
{
tableAlias += ".";
}
//添加参数
var dbParamName = string.Empty;
if (expression.Right is ConstantExpression)
{
var value = Convert.ToBoolean(((ConstantExpression)expression.Right).Value) ? 1 : 0;
dbParamName = sqlBuilder.AddDbParameter(1);
}
else
{
dbParamName = sqlBuilder.AddDbParameter(1);
}
//添加关联条件
sqlBuilder.SqlJoinStr += " " + tableAlias + memberExpression.Member.Name;
sqlBuilder.SqlJoinStr += " = ";
sqlBuilder.SqlJoinStr += $"{dbParamName}";
}
else
{
SqlProvider.Join(expression.Right, sqlBuilder);
}
}
return(sqlBuilder);
}
