c# - What is the best way to query entities with n-to-m relations with Dapper -


this part of data model in sql server:

  • product
    • id
    • name
    • ...
  • productvariety
    • id
    • name
    • ...
  • order
    • id
    • ...
  • order_ref_product
    • id
    • order_id
    • product_id
    • ...
  • order_ref_product_ref_variety
    • order_ref_product_id
    • productvariety_id

my c# poco classes (i removed of clutter {get;set;} etc. simplicity):

class order {     list<product> products }  class product {     string name     list<productvariety> varieties }  class productvariety { }

for querying these via dapper, created 3 repositories, call each other recursively:

  • orderrepository
    • selects single order id
    • then calls productrepository resolve products list.
  • productrepository
    • selects join of order_ref_product + product order_id
    • then calls productvarietyrepository each object resolve varieties list.
  • productvarietyrepository
    • selects join of order_ref_product_ref_variety + productvariety order_ref_product_id

this works, however, i wonder if there better / cleaner / more performant way query object tree using dapper.


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