67 lines
2.0 KiB
C#
67 lines
2.0 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Linq.Expressions;
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using System.Text;
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using System.Text.RegularExpressions;
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using System.Threading.Tasks;
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namespace SqlSugar
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{
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public class SubLeftJoin : ISubOperation
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{
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public bool HasWhere
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{
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get; set;
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}
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public string Name
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{
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get { return "LeftJoin"; }
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}
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public Expression Expression
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{
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get; set;
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}
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public int Sort
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{
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get
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{
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return 301;
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}
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}
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public ExpressionContext Context
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{
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get; set;
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}
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public string GetValue(Expression expression)
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{
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var exp = expression as MethodCallExpression;
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var argExp = exp.Arguments[0];
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var name =this.Context.GetTranslationColumnName((argExp as LambdaExpression).Parameters[0].Name);
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var parameter = (argExp as LambdaExpression).Parameters.Last();
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foreach (var item in (argExp as LambdaExpression).Parameters)
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{
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Context.InitMappingInfo(item.Type);
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}
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this.Context.RefreshMapping();
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var tableName= Context.GetTranslationTableName(parameter.Type.Name, true);
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var joinString =string.Format(" {2} LEFT JOIN {1} {0} ",
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this.Context.GetTranslationColumnName(parameter.Name),
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tableName,
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null);
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var result = joinString+ "ON " + SubTools.GetMethodValue(Context, argExp, ResolveExpressType.WhereMultiple);
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//var selfParameterName = Context.GetTranslationColumnName((argExp as LambdaExpression).Parameters.First().Name) + UtilConstants.Dot;
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this.Context.JoinIndex++;
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new SubSelect() { Context = this.Context }.SetShortName(exp, "+");
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//result = result.Replace(selfParameterName, SubTools.GetSubReplace(this.Context));
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return result;
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}
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}
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}
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