So erhalten Sie EF.core, um LEFT JOINs statt INNER JOINs zu verwenden

Question

Ich versuche, Details zu Fremdschlüsseln als Teil meiner Abfrage einzubeziehen.

Wie kann ich EF.coreLEFT JOINs statt INNER JOINs verwenden?

public class Offence 
    { 
    [Key] 
    public Int32 offence_id { get; set; } 

    public Int32 guard_id { get; set; } 
    public Int32 penalty_id { get; set; } 
    public DateTime? dt_recorded { get; set; } 
    public Int32 salary_id { get; set; } 
    public Decimal? amount { get; set; } 
    public String status { get; set; } 
    public Int32 site_id { get; set; } 

    public Guard Guard { get; set; } 
    public Salary Salary { get; set; } 
    public Site Site { get; set; } 
    public Penalty Penalty { get; set; } 

    public DateTime? last_modified { get; set; } 
    public int? last_modified_by { get; set; } 
    } 

Kontroller GetList

var offences = db.Offences 
     .Include(e => e.Guard) 
     .Include(e => e.Penalty) 
     .Include(e => e.Site) 
     .Include(e => e.Salary) 
     .AsNoTracking(); 

generiert SQL:

SELECT [e].[offence_id], [e].[amount], [e].[dt_recorded], [e].[guard_id], [e].[last_modified], [e].[last_modified_by], [e].[penalty_id], [e].[salary_id], [e].[site_id], [e].[status], [e.Salary].[salary_id], [e.Salary].[dt_paid], [e.Salary].[guard_id], [e.Salary].[last_modified], [e.Salary].[last_modified_by], [e.Salary].[period], [e.Site].[site_id], [e.Site].[address], [e.Site].[client_id], [e.Site].[last_modified], [e.Site].[last_modified_by], [e.Site].[name], [e.Site].[state], [e.Penalty].[penalty_id], [e.Penalty].[amount], [e.Penalty].[description], [e.Penalty].[dt], [e.Penalty].[last_modified], [e.Penalty].[last_modified_by], [e.Penalty].[name], [e.Guard].[guard_id], [e.Guard].[address], [e.Guard].[bank], [e.Guard].[dob], [e.Guard].[dt_joined], [e.Guard].[dt_trained], [e.Guard].[has_picture], [e.Guard].[height], [e.Guard].[last_modified], [e.Guard].[last_modified_by], [e.Guard].[location_id], [e.Guard].[marital_status], [e.Guard].[mobiles], [e.Guard].[name], [e.Guard].[nuban], [e.Guard].[ref_no], [e.Guard].[religion], [e.Guard].[salary], [e.Guard].[sex], [e.Guard].[state_origin], [e.Guard].[status] 
FROM [Offences] AS [e] 
left JOIN [Salaries] AS [e.Salary] ON [e].[salary_id] = [e.Salary].[salary_id] 
left JOIN [Sites] AS [e.Site] ON [e].[site_id] = [e.Site].[site_id] 
left JOIN [Penalties] AS [e.Penalty] ON [e].[penalty_id] = [e.Penalty].[penalty_id] 
left JOIN [Guards] AS [e.Guard] ON [e].[guard_id] = [e.Guard].[guard_id] 
ORDER BY [e.Guard].[name] 

Answer 1

die Lösung gefunden, alle Fremdschlüssel null der Lage machen, dann EF.core verwendet eine LEFT JOIN für die Abfrage stattdessen:

public class Offence 
    { 
    [Key] 
    public Int32 offence_id { get; set; } 

    public Int32? guard_id { get; set; } // make null-able 
    public Int32? penalty_id { get; set; } // make null-able 
    public DateTime? dt_recorded { get; set; } 
    public Int32? salary_id { get; set; } // make null-able 
    public Decimal? amount { get; set; } 
    public String status { get; set; } 
    public Int32? site_id { get; set; } // make null-able 

    public Guard Guard { get; set; } 
    public Salary Salary { get; set; } 
    public Site Site { get; set; } 
    public Penalty Penalty { get; set; } 

    public DateTime? last_modified { get; set; } 
    public int? last_modified_by { get; set; } 
    }