问题描述
我在 EF Core 5.0 中遇到迁移问题:
在上引入 FOREIGN KEY 约束“FK_Trades_Signals_SignalID” 表“交易”可能会导致循环或多个级联路径。指定开启 DELETE NO ACTION 或 ON UPDATE NO ACTION,或修改其他 FOREIGN KEY 约束。
这是表格:
public class Signal
{
public int SignalID { get; set; }
public Type Type { get; set; }
public int Buy { get; set; }
public int Sell { get; set; }
public int Neutral { get; set; }
[required]
public int CoinID { get; set; }
public virtual Coin Coin { get; set; }
public int? TradeID { get; set; }
public Trade Trade { get; set; }
}
public class Trade
{
public int TradeID { get; set; }
[required]
public int CoinID { get; set; }
public virtual Coin Coin { get; set; }
public DateTime TradeDate { get; set; }
[Column(TypeName = "decimal(16,8)")]
public decimal Price { get; set; }
[Column(TypeName = "decimal(16,8)")]
public decimal Amount { get; set; }
public TradeStatus Status { get; set; }
[ForeignKey("Signal")]
public int? SignalID { get; set; }
public virtual Signal Signal { get; set; }
[Column(TypeName = "decimal(8,2)")]
public decimal ProfitLoss { get; set; }
}
我尝试了很多东西,但仍然出现错误。
我尝试了同样的错误:
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
modelBuilder.Entity<Trade>().HasOne<Signal>(s => s.Signal).WithOne(t => t.Trade).OnDelete(DeleteBehavior.NoAction);
}
请帮忙。
解决方法
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