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- 完善 $"{id}_{name}" lambda 解析与测试；

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28810
2020-07-05 06:32:13 +08:00
parent 1d48f17f81
commit d61997d1b2
33 changed files with 442 additions and 35 deletions
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14
Providers/FreeSql.Provider.SqlServer/SqlServerExpression.cs
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@ -255,6 +255,20 @@ namespace FreeSql.SqlServer
return $"({arg2} is null or {arg2} = '' or ltrim({arg2}) = '')";
case "Concat":
return _common.StringConcat(exp.Arguments.Select(a => getExp(a)).ToArray(), exp.Arguments.Select(a => a.Type).ToArray());
case "Format":
if (exp.Arguments[0].NodeType != ExpressionType.Constant) throw new Exception($"未实现函数表达式 {exp} 解析，参数 {exp.Arguments[0]} 必须为常量");
var expArgs0 = ExpressionLambdaToSql(exp.Arguments[0], tsc);
if (exp.Arguments.Count == 1) return expArgs0;
var nchar = expArgs0.StartsWith("N'") ? "N" : "";
var expArgs = exp.Arguments.Where((a, z) => z > 0).Select(a =>
{
var atype = (a as UnaryExpression)?.Operand.Type.NullableTypeOrThis() ?? a.Type.NullableTypeOrThis();
if (atype == typeof(string)) return $"'+({ExpressionLambdaToSql(a, tsc)})+{nchar}'";
if (atype == typeof(Guid)) return $"'+cast({ExpressionLambdaToSql(a, tsc)} as char(36))+{nchar}'";
if (atype.IsNumberType()) return $"'+cast({ExpressionLambdaToSql(a, tsc)} as varchar)+{nchar}'";
return $"'+cast({ExpressionLambdaToSql(a, tsc)} as nvarchar(max))+{nchar}'";
}).ToArray();
return string.Format(expArgs0, expArgs);
}
}
else