entity framework - EF 5.0 Code First - manytomany relationship - fluent api - override the generated mm table with my own -

i have 2 entities. each has navigation prop other, ef automatically creates m2m mapping table. classes activity , trip, ef creates activitytrip map relationships. wonderful - but:

i need have data in relationship records, want provide own m2m table , use fluent api map relationship table instead of auto generated one.

here classes:

public class activity {     public int id { get; set; }     public string name { get; set; }     public virtual icollection<trip> trips { get; set; } }  public class trip {     public int id { get; set; }     public string name { get; set; }     public virtual icollection<activity> activities { get; set; } }  public class activitytrip //want use own manytomany join table fields {     public int activityid { get; set; }     public int tripid { get; set; }     //extra data     public string activitytriptype { get; set; } } 

here configurations:

public class activityconfiguration : entitytypeconfiguration<activity> {     public activityconfiguration()     {         haskey(p => p.id);         hasmany(t => t.trips)         .withmany(a => a.activities)         .map(m =>         {             m.totable("activitytrip");             m.mapleftkey("activityid");             m.maprightkey("tripid");         });     } }  public class tripconfiguration : entitytypeconfiguration<trip> {     public tripconfiguration()     {         haskey(p => p.id);     } }  public class activitytripconfiguration : entitytypeconfiguration<activitytrip> {     public activitytripconfiguration()     {         haskey(p => new { p.activityid, p.tripid });     } } 

ef still generates it's own activitytrip table fks m2m relationship. ef generates activitytrip1 table coded first activitytrip entity 2 primary keys , field.

it not seeing want control generation of m2m table. , map foreign keys table. i'm doing wrong - please advise...

thanks, gerry

additional data in junction table isn't supported ef, need treat data entity.

in other words, 2 one-to-many relationships additional entity represents record in junction table.

you have additional entity type - activitytrip - need model 2 one-to-many relationships.