add all read methods to LiveTransaction and have them accept tx in Repo

spec/transactions_spec.cr

@@ -333,6 +333,54 @@ describe Crecto do
         Repo.all(User, Query.where(name: "perform_all")).size.should eq 2
         Repo.all(User, Query.where(name: "perform_all_io2oj999")).size.should eq 0
       end
+
+      it "allows reading records inserted inside the transaction" do
+        insert_user = User.new
+        insert_user.name = "insert_user"
+
+        Repo.transaction! do |tx|
+          id = tx.insert!(insert_user).instance.id
+          tx.get(User, id).should_not eq(nil)
+          tx.get!(User, id).should_not eq(nil)
+          tx.get(User, id, Query.new).should_not eq(nil)
+          tx.get!(User, id, Query.new).should_not eq(nil)
+          tx.get_by(User, id: id).should_not eq(nil)
+          tx.get_by!(User, id: id).should_not eq(nil)
+          tx.get_by(User, id: id).should_not eq(nil)
+          tx.get_by!(User, id: id).should_not eq(nil)
+          tx.get_by(User, Query.where(id: id)).should_not eq(nil)
+          tx.get_by!(User, Query.where(id: id)).should_not eq(nil)
+          tx.all(User, Query.where(id: id)).first.should_not eq(nil)
+          tx.all(User, Query.where(id: id), preloads: [] of Symbol).first.should_not eq(nil)
+        end
+      end
+
+      it "allows nesting transactions" do
+        Repo.delete_all(Post)
+        Repo.delete_all(User)
+
+        insert_user = User.new
+        insert_user.name = "nested_transactions_insert_user"
+        invalid_user = User.new
+        delete_user = quick_create_user("nested_transactions_delete_user")
+
+        Repo.transaction! do |tx|
+          tx.insert!(insert_user)
+
+          expect_raises Crecto::InvalidChangeset do
+            Repo.transaction! do |inner_tx|
+              inner_tx.delete!(delete_user)
+              inner_tx.insert!(invalid_user)
+            end
+          end
+        end
+
+        # check insert happened
+        Repo.all(User, Query.where(name: "nested_transactions_insert_user")).size.should eq 1
+
+        # check delete didn't happen
+        Repo.all(User, Query.where(name: "nested_transactions_delete_user")).size.should eq 1
+      end
     end
   end
 end

src/crecto/live_transaction.cr

@@ -1,10 +1,86 @@
-require "./multi"
+require "./repo/query"
 
 module Crecto
   class LiveTransaction(T)
+    alias Query = Repo::Query
+
     def initialize(@tx : DB::Transaction, @repo : T)
     end
 
+    def raw_exec(args : Array)
+      @repo.raw_exec(args, @tx)
+    end
+
+    def raw_exec(*args)
+      @repo.raw_exec(*args, @tx)
+    end
+
+    def raw_query(query, *args)
+      @repo.raw_query(query, *args, @tx) do |rs|
+        yield rs
+      end
+    end
+
+    def raw_query(query, args : Array)
+      @repo.raw_query(query, args, @tx)
+    end
+
+    def raw_query(query, *args)
+      @repo.raw_query(query, *args)
+    end
+
+    def raw_scalar(*args)
+      @repo.raw_scalar(*args, @tx)
+    end
+
+    def all(queryable, query : Query? = Query.new, **opts)
+      @repo.all(queryable, query, @tx, **opts)
+    end
+
+    def all(queryable, query = Query.new)
+      @repo.all(queryable, query, @tx)
+    end
+
+    def get(queryable, id)
+      @repo.get(queryable, id, @tx)
+    end
+
+    def get!(queryable, id)
+      @repo.get!(queryable, id, @tx)
+    end
+
+    def get(queryable, id, query : Query)
+      @repo.get(queryable, id, query, @tx)
+    end
+
+    def get!(queryable, id, query : Query)
+      @repo.get!(queryable, id, query, @tx)
+    end
+
+    def get_by(queryable, **opts)
+      @repo.get_by(queryable, @tx, **opts)
+    end
+
+    def get_by(queryable, query)
+      @repo.get_by(queryable, query, @tx)
+    end
+
+    def get_by!(queryable, **opts)
+      @repo.get_by!(queryable, @tx, **opts)
+    end
+
+    def get_by!(queryable, query)
+      @repo.get_by!(queryable, query, @tx)
+    end
+
+    def get_association(queryable_instance, association_name : Symbol)
+      @repo.get_association(queryable_instance, association_name, @tx)
+    end
+
+    def get_association!(queryable_instance, association_name : Symbol)
+      @repo.get_association!(queryable_instance, association_name, @tx)
+    end
+
     {% for type in %w[insert insert! delete delete! update update!] %}
       def {{type.id}}(queryable : Crecto::Model)
         @repo.{{type.id}}(queryable, @tx)
@@ -26,5 +102,19 @@ module Crecto
     def update_all(queryable, query, update_tuple : NamedTuple)
       update_all(queryable, query, update_tuple.to_h)
     end
+
+    def aggregate(queryable, aggregate_function : Symbol, field : Symbol)
+      @repo.aggregate(queryable, aggregate_function, field, @tx)
+    end
+
+    def aggregate(queryable, aggregate_function : Symbol, field : Symbol, query : Crecto::Repo::Query)
+      @repo.aggregate(queryable, aggregate_function, field, query, @tx)
+    end
+
+    def transaction!
+      @repo.transaction!(@tx) do |tx|
+        yield tx
+      end
+    end
   end
 end