Entity framework core attach/update for child objects











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I'm using entity framework core 2.1 and my database context contains of the follwing classes



public class MultiStringSetting

{

    public int Id { get; set; }

    public virtual IEnumerable<MultiString> Values { get; set; }

}



public class MultiString

{

    public int Id { get; set; }

    public string Value { get; set; }

}


Consider the following: I have 3 MultiString objects in my database with id's 1, 2 and 3. My current MultiStringSetting has MultiString 1 in its Values. What i would like to do now is set the Values of my MultiStringSetting to 2 and 3, without removing MultiString 1 from my database. How can i achieve this? I tried some things like attach and update but both had no success for me.



Bonus question: What if i have the same scenario as above however i now have a list of MultiStringSetting and i want to update them all.






.net-core entity-framework-core







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    up vote
    0
    down vote

    favorite












    I'm using entity framework core 2.1 and my database context contains of the follwing classes



    public class MultiStringSetting
    
{
    
    public int Id { get; set; }
    
    public virtual IEnumerable<MultiString> Values { get; set; }
    
}
    

    
public class MultiString
    
{
    
    public int Id { get; set; }
    
    public string Value { get; set; }
    
}


    Consider the following: I have 3 MultiString objects in my database with id's 1, 2 and 3. My current MultiStringSetting has MultiString 1 in its Values. What i would like to do now is set the Values of my MultiStringSetting to 2 and 3, without removing MultiString 1 from my database. How can i achieve this? I tried some things like attach and update but both had no success for me.



    Bonus question: What if i have the same scenario as above however i now have a list of MultiStringSetting and i want to update them all.






    .net-core entity-framework-core







    share|improve this question
























      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      I'm using entity framework core 2.1 and my database context contains of the follwing classes



      public class MultiStringSetting
      
{
      
    public int Id { get; set; }
      
    public virtual IEnumerable<MultiString> Values { get; set; }
      
}
      

      
public class MultiString
      
{
      
    public int Id { get; set; }
      
    public string Value { get; set; }
      
}


      Consider the following: I have 3 MultiString objects in my database with id's 1, 2 and 3. My current MultiStringSetting has MultiString 1 in its Values. What i would like to do now is set the Values of my MultiStringSetting to 2 and 3, without removing MultiString 1 from my database. How can i achieve this? I tried some things like attach and update but both had no success for me.



      Bonus question: What if i have the same scenario as above however i now have a list of MultiStringSetting and i want to update them all.






      .net-core entity-framework-core







      share|improve this question













      I'm using entity framework core 2.1 and my database context contains of the follwing classes



      public class MultiStringSetting
      
{
      
    public int Id { get; set; }
      
    public virtual IEnumerable<MultiString> Values { get; set; }
      
}
      

      
public class MultiString
      
{
      
    public int Id { get; set; }
      
    public string Value { get; set; }
      
}


      Consider the following: I have 3 MultiString objects in my database with id's 1, 2 and 3. My current MultiStringSetting has MultiString 1 in its Values. What i would like to do now is set the Values of my MultiStringSetting to 2 and 3, without removing MultiString 1 from my database. How can i achieve this? I tried some things like attach and update but both had no success for me.



      Bonus question: What if i have the same scenario as above however i now have a list of MultiStringSetting and i want to update them all.






      .net-core entity-framework-core




      .net-core entity-framework-core






      share|improve this question













      share|improve this question











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      share|improve this question










      asked 10 hours ago









      Gilian

      1711110




      1711110





























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