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表达式函数，增加DateTime/TimeSpan，并且开始测试与整理

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28810
2018-12-20 20:00:33 +08:00
parent 6f8a047149
commit 572aa1d8ee
21 changed files with 1542 additions and 460 deletions
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32
FreeSql/Internal/CommonExpression.cs
View File

@@ -160,11 +160,27 @@ namespace FreeSql.Internal {
case ExpressionType.Lambda: return ExpressionLambdaToSql((exp as LambdaExpression)?.Body, _tables, _selectColumnMap, tbtype, isQuoteName);
case ExpressionType.Convert: return ExpressionLambdaToSql((exp as UnaryExpression)?.Operand, _tables, _selectColumnMap, tbtype, isQuoteName);
case ExpressionType.Constant: return _common.FormatSql("{0}", (exp as ConstantExpression)?.Value);
case ExpressionType.Call:
var exp3 = exp as MethodCallExpression;
if (exp3.Object.Type.FullName == "System.String") return ExpressionLambdaToSqlCallString(exp3, _tables, _selectColumnMap, tbtype, isQuoteName);
if (exp3.Object.Type.FullName == "System.Math") return ExpressionLambdaToSqlCallMath(exp3, _tables, _selectColumnMap, tbtype, isQuoteName);
if (exp3.Object.Type.FullName == "System.DateTime" || exp3.Object.Type.GenericTypeArguments.FirstOrDefault()?.FullName == "System.DateTime") return ExpressionLambdaToSqlCallDateTime(exp3, _tables, _selectColumnMap, tbtype, isQuoteName);
if (exp3.Object.Type.FullName == "System.TimeSpan" || exp3.Object.Type.GenericTypeArguments.FirstOrDefault()?.FullName == "System.TimeSpan") return ExpressionLambdaToSqlCallTimeSpan(exp3, _tables, _selectColumnMap, tbtype, isQuoteName);
throw new Exception($"MySqlExpression 未现实函数表达式 {exp3} 解析");
case ExpressionType.MemberAccess:
var exp4 = exp as MemberExpression;
var extRet = "";
if (exp4.Expression == null && exp4.Type.FullName == "System.DateTime" && exp4.Member.Name == "Now") return ExpressionLambdaToSqlMemberAccessDateTime(exp4, _tables, _selectColumnMap, tbtype, isQuoteName);
if (exp4.Expression.Type.FullName == "System.String") extRet = ExpressionLambdaToSqlMemberAccessString(exp4, _tables, _selectColumnMap, tbtype, isQuoteName);
else if (exp4.Expression.Type.FullName == "System.Math") extRet = ExpressionLambdaToSqlMemberAccessMath(exp4, _tables, _selectColumnMap, tbtype, isQuoteName);
else if (exp4.Expression.Type.FullName == "System.DateTime" || exp4.Type.GenericTypeArguments.FirstOrDefault()?.FullName == "System.DateTime") extRet = ExpressionLambdaToSqlMemberAccessDateTime(exp4, _tables, _selectColumnMap, tbtype, isQuoteName);
else if (exp4.Expression.Type.FullName == "System.TimeSpan" || exp4.Type.GenericTypeArguments.FirstOrDefault()?.FullName == "System.TimeSpan") extRet = ExpressionLambdaToSqlMemberAccessTimeSpan(exp4, _tables, _selectColumnMap, tbtype, isQuoteName);
if (string.IsNullOrEmpty(extRet) == false) return extRet;
var expStack = new Stack<Expression>();
expStack.Push(exp);
MethodCallExpression callExp = null;
var exp2 = (exp as MemberExpression).Expression;
var exp2 = exp4.Expression;
while (true) {
switch(exp2.NodeType) {
case ExpressionType.Constant:
@@ -188,7 +204,7 @@ namespace FreeSql.Internal {
break;
}
if (expStack.First().NodeType != ExpressionType.Parameter) return _common.FormatSql("{0}", Expression.Lambda(exp).Compile().DynamicInvoke());
if (callExp != null) return ExpressionLambdaToSqlCall(callExp, _tables, _selectColumnMap, tbtype, isQuoteName);
if (callExp != null) return ExpressionLambdaToSql(callExp, _tables, _selectColumnMap, tbtype, isQuoteName);
if (_tables == null) {
var pp = expStack.Pop() as ParameterExpression;
var memberExp = expStack.Pop() as MemberExpression;
@@ -255,7 +271,6 @@ namespace FreeSql.Internal {
}
if (isQuoteName) name2 = _common.QuoteSqlName(name2);
return $"{alias2}.{name2}";
case ExpressionType.Call: return ExpressionLambdaToSqlCall(exp as MethodCallExpression, _tables, _selectColumnMap, tbtype, isQuoteName);
}
if (dicExpressionOperator.TryGetValue(exp.NodeType, out var tryoper) == false) return "";
var expBinary = exp as BinaryExpression;
@@ -268,10 +283,17 @@ namespace FreeSql.Internal {
left = tmp;
}
if (right == "NULL") tryoper = tryoper == "=" ? " IS " : " IS NOT ";
if (tryoper == "+" && (expBinary.Left.Type.FullName == "System.String" || expBinary.Right.Type.FullName == "System.String")) return _common.StringConcat(left, right, expBinary.Left.Type, expBinary.Right.Type);
return $"{left} {tryoper} {right}";
}
internal abstract string ExpressionLambdaToSqlCall(MethodCallExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, SelectTableInfoType tbtype, bool isQuoteName);
internal abstract string ExpressionLambdaToSqlMemberAccessString(MemberExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, SelectTableInfoType tbtype, bool isQuoteName);
internal abstract string ExpressionLambdaToSqlMemberAccessMath(MemberExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, SelectTableInfoType tbtype, bool isQuoteName);
internal abstract string ExpressionLambdaToSqlMemberAccessDateTime(MemberExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, SelectTableInfoType tbtype, bool isQuoteName);
internal abstract string ExpressionLambdaToSqlMemberAccessTimeSpan(MemberExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, SelectTableInfoType tbtype, bool isQuoteName);
internal abstract string ExpressionLambdaToSqlCallString(MethodCallExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, SelectTableInfoType tbtype, bool isQuoteName);
internal abstract string ExpressionLambdaToSqlCallMath(MethodCallExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, SelectTableInfoType tbtype, bool isQuoteName);
internal abstract string ExpressionLambdaToSqlCallDateTime(MethodCallExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, SelectTableInfoType tbtype, bool isQuoteName);
internal abstract string ExpressionLambdaToSqlCallTimeSpan(MethodCallExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, SelectTableInfoType tbtype, bool isQuoteName);
}
}

1
FreeSql/Internal/CommonUtils.cs
View File

@@ -16,6 +16,7 @@ namespace FreeSql.Internal {
internal abstract string QuoteSqlName(string name);
internal abstract string QuoteParamterName(string name);
internal abstract string IsNull(string sql, object value);
internal abstract string StringConcat(string left, string right, Type leftType, Type rightType);
internal ICodeFirst CodeFirst { get; set; }
internal TableInfo GetTableByEntity(Type entity) => Utils.GetTableByEntity(entity, this);