private string GenerateLamdaCode <TEntity>(SearchConditionDto condition, ColumnInfo column, out LambdaExpression dbLamda)
{
dbLamda = null;
var value = condition.Value;
var valuePath = $"{column.ValuePath}";
if (column.IsPropertyColumn)
{
//自定义属性列的查询
//var dbFuncName = GetDbFunctionName(column.ColumnType);
//var p = Expression.Parameter(typeof(TEntity), "x");
//var _pExp = Expression.Constant($"$.{column.ColumnKey}", typeof(string));
//MemberExpression member = Expression.PropertyOrField(p, "Property");
//var expRes = Expression.Call(typeof(TEntity).GetEntityDbContextType().GetMethod(dbFuncName), member, _pExp);
//dbLamda = Expression.Lambda(expRes, p);
dbLamda = DynamicPropertyHelper.GeneratePropertyLamda <TEntity>(column.ColumnType, column.ColumnKey);
//valuePath = $"MasterDbContext.{dbFuncName}(Property,\"$.{column.ColumnKey}\")";
//基于数据库json字段的查询需要动态构建lamda
valuePath = "@0(it)";//@0之后会由dbLamda代入
}
if (column.ColumnType != ColumnTypes.Number)
{
value = $"\"{value}\"";
}
if (column.ColumnType == ColumnTypes.DateTime)
{
//日期类型需要转换
value = $"DateTime.Parse({value})";
}
//以.开头的为字符串操作
if (condition.Operator.StartsWith("."))
{
//加括号:a.StartsWith("b")
value = $"({value})";
}
else if (string.IsNullOrEmpty(condition.Value))
{
//非字符串操作，如果未传值，作null处理
value = "null";
}
return($"{valuePath}{condition.Operator}{value}");
}
private IQueryable GeneratePropertyOrderQuery <TEntity>(string columnKey, SortType sortType, IQueryable query)
{
var expression = (Expression <Func <TEntity, string> >)DynamicPropertyHelper.GeneratePropertyLamda <TEntity>(ColumnTypes.Text, columnKey);
if (sortType == SortType.Asc)
{
//query = (query as IQueryable<TEntity>).OrderBy(o => MasterDbContext.GetJsonValueString(o.Property, $"$.{columnKey}"));
query = (query as IQueryable <TEntity>).OrderBy(expression);
}
else
{
//query = (query as IQueryable<TEntity>).OrderByDescending(o => MasterDbContext.GetJsonValueString(o.Property, $"$.{columnKey}"));
query = (query as IQueryable <TEntity>).OrderByDescending(expression);
}
//(query as IQueryable<TEntity>).OrderBy(DynamicPropertyHelper.GeneratePropertyLamda<TEntity>(ColumnTypes.Text,columnKey))
return(query);
}
/// <summary>
/// @0(it).Contains("李") or ProejctSN="bb"
/// </summary>
/// <typeparam name="TEntity"></typeparam>
/// <param name="where">Property[string ProjectCharger].Contains("李") or ProejctSN="bb" and Status.contains("Emergency")</param>
/// <param name="query"></param>
/// <returns></returns>
public IQueryable ParseWhere <TEntity>(string where, IQueryable query)
{
var newWhere = where;
var matches = new Regex("(\\w+\\.)?Property\\[((Number|String|Date|Bool)\\s)?(.*?)\\]", RegexOptions.IgnoreCase).Matches(where);
var lamdaIndex = 0;
var lamdas = new List <object>();
foreach (Match match in matches)
{
var replaceSource = match.Value; //Property[Number TenantId] Property[Date TenantId]
var propertyPath = match.Result("$1") + "Property"; //Material.Property
var columnType = match.Result("$3"); //Number
var columnKey = match.Result("$4"); //TenantId
newWhere = newWhere.Replace(replaceSource, $"@{lamdaIndex}(it)");
var lamda = DynamicPropertyHelper.GeneratePropertyLamda <TEntity>(DynamicPropertyHelper.GetColumnTypeFromString(columnType), columnKey, propertyPath);
lamdas.Add(lamda);
lamdaIndex++;
}
return(query.Where(newWhere, lamdas.ToArray()));
}
/// <summary>
/// ProjectSN.Contains("a") 或者 @1(it)="2"
/// </summary>
/// <typeparam name="TEntity"></typeparam>
/// <param name="condition"></param>
/// <param name="moduleInfo"></param>
/// <returns></returns>
private string GenerateLamdaCode <TEntity>(SoulTableConditionDto condition, ModuleInfo moduleInfo)
{
ColumnInfo column;
//需要判断是模块的筛选还是普通表格
if (moduleInfo != null)
{
column = moduleInfo.ColumnInfos.Where(o => o.ColumnKey.ToLower() == condition.Field?.ToLower() || o.ColumnKey.ToLower() + "_display" == condition.Field?.ToLower()).Single();
}
else
{
column = new ColumnInfo()
{
ColumnKey = condition.Field,
ColumnType = condition.Mode == "date" ? ColumnTypes.DateTime : ColumnTypes.Text,
ValuePath = condition.Field,
};
}
var value = condition.Value;
var values = condition.Values;
var valuePath = $"{column.ValuePath}"; //代表要查询的数据字段，可能是直接字段，如ProjectSN 或者是property中的数据,如MasterDbContext.GetJsonValueString(o.Property,"$.a")
if (!string.IsNullOrEmpty(column.DisplayPath)) //设置了displaypath的以displaypath为优先查询目标
{
valuePath = column.DisplayPath;
}
if (column.IsPropertyColumn)
{
//自定义属性列的查询
//var dbFuncName = DynamicPropertyHelper.GetDbFunctionName(column.ColumnType);
//var p = Expression.Parameter(typeof(TEntity), "x");
//var _pExp = Expression.Constant($"$.{column.ColumnKey}", typeof(string));
//MemberExpression member = Expression.PropertyOrField(p, "Property");
//var expRes = Expression.Call(typeof(TEntity).GetEntityDbContextType().GetMethod(dbFuncName), member, _pExp);
//dbLamda = Expression.Lambda(expRes, p);
var lambdaExpression = DynamicPropertyHelper.GeneratePropertyLamda <TEntity>(column.ColumnType, column.ColumnKey);
//valuePath = $"MasterDbContext.{dbFuncName}(Property,\"$.{column.ColumnKey}\")";
//基于数据库json字段的查询需要动态构建lamda
valuePath = $"@{_soulLamdaIndex++}(it)";//@0之后会由dbLamda代入
_lamdaList.Add(lambdaExpression);
}
Func <string, string> valueWrapp = inValue =>
{
string outValue = inValue;
if (column.ColumnType != ColumnTypes.Number)
{
outValue = $"\"{inValue}\"";
}
if (column.ColumnType == ColumnTypes.DateTime)
{
//日期类型需要转换
outValue = $"DateTime.Parse({outValue})";
}
return(outValue);
};
value = valueWrapp(value);
string code = "";
if (condition.Mode == "in")
{
//如果未传入筛选数据数组，直接返回
code = values.Count == 0 ? "1=1" : string.Join(" Or ", values.Select(o => $"{valuePath}={valueWrapp(o)}"));
code = $"({code})";
}
else if (condition.Mode == "date")
{
//日期的筛选
if (condition.Type == "all")
{
code = "1=1";
}
else if (condition.Type == "specific")
{
if (condition.Value.Length == 10)
{
//形如2020-01-01形式的日期比较
code = $"({valuePath}>={valueWrapp(condition.Value)} and {valuePath}<={valueWrapp(condition.Value + " 23:59:59")})";
}
else
{
code = $"{valuePath}={value}";
}
}
else
{
var dateTimeValues = GetDateTimeValuesByIdentifier(condition.Type);
code = $"{valuePath}>={valueWrapp(dateTimeValues.startDate.ToString())} && {valuePath}<={valueWrapp(dateTimeValues.endDate.ToString())}";
}
}
else
{
switch (condition.Type)
{
case "eq":
code = $"{valuePath}={value}";
break;
case "ne":
code = $"{valuePath}!={value}";
break;
case "gt":
code = $"{valuePath}>{value}";
break;
case "ge":
code = $"{valuePath}>={value}";
break;
case "lt":
code = $"{valuePath}<{value}";
break;
case "le":
code = $"{valuePath}<={value}";
break;
case "contain":
code = $"{valuePath}.Contains({value})";
break;
case "notContain":
code = $"!{valuePath}.Contains({value})";
break;
case "start":
code = $"{valuePath}.StartWith({value})";
break;
case "end":
code = $"{valuePath}.EndWith({value})";
break;
case "null":
code = $"{valuePath}=null";
break;
case "notNull":
code = $"{valuePath}!=null";
break;
}
}
return(code);
}
