From 4dd207de9cd8fba9beaa935836d3bf0a7501899f Mon Sep 17 00:00:00 2001
From: NathanP9000 <73033177+NathanP9000@users.noreply.github.com>
Date: Thu, 25 Sep 2025 17:13:18 -0500
Subject: [PATCH 1/4] added group function in pipeline to aggregate documents
 with the same professor id. This removes duplicates.

---
 api/controllers/course.go | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/api/controllers/course.go b/api/controllers/course.go
index 02428c3..3b090e8 100644
--- a/api/controllers/course.go
+++ b/api/controllers/course.go
@@ -3,6 +3,7 @@ package controllers
 import (
 	"context"
 	"errors"
+	"fmt"
 	"net/http"
 	"time"
 
@@ -295,7 +296,7 @@ func courseProfessor(flag string, c *gin.Context) {
 	if courseQuery, err = getCourseQuery(flag, c); err != nil {
 		return
 	}
-
+	fmt.Println("getCourseQuery error:", courseQuery)
 	// determine the offset and limit for pagination stage and delete
 	// "offset" field in professorQuery
 	paginateMap, err := configs.GetAggregateLimit(&courseQuery, c)
@@ -303,7 +304,7 @@ func courseProfessor(flag string, c *gin.Context) {
 		respond(c, http.StatusBadRequest, "Error offset is not type integer", err.Error())
 		return
 	}
-
+	fmt.Println("getCourseQuery error:", paginateMap)
 	// Pipeline to query the professors from the filtered courses
 	courseProfessorPipeline := mongo.Pipeline{
 		// filter the courses
@@ -337,7 +338,11 @@ func courseProfessor(flag string, c *gin.Context) {
 
 		// replace the courses with professors
 		bson.D{{Key: "$replaceWith", Value: "$professors"}},
-
+		bson.D{{Key: "$group", Value: bson.D{ // Groups all documents by professords _id
+			{Key: "_id", Value: "$_id"},
+			{Key: "doc", Value: bson.D{{Key: "$first", Value: "$$ROOT"}}}, // Keeps first full document 
+		}}},
+		bson.D{{Key: "$replaceWith", Value: "$doc"}},
 		// keep order deterministic between calls
 		bson.D{{Key: "$sort", Value: bson.D{{Key: "_id", Value: 1}}}},
 
@@ -345,7 +350,7 @@ func courseProfessor(flag string, c *gin.Context) {
 		bson.D{{Key: "$skip", Value: paginateMap["latter_offset"]}},
 		bson.D{{Key: "$limit", Value: paginateMap["limit"]}},
 	}
-
+	fmt.Println(courseProfessorPipeline)
 	// perform aggregation on the pipeline
 	cursor, err := courseCollection.Aggregate(ctx, courseProfessorPipeline)
 	if err != nil {

From 29ffe3a313661870c56b2d840e557a909ce3a076 Mon Sep 17 00:00:00 2001
From: NathanP9000 <73033177+NathanP9000@users.noreply.github.com>
Date: Mon, 27 Oct 2025 17:27:40 -0500
Subject: [PATCH 2/4] Added back the errors import.

---
 api/controllers/course.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/api/controllers/course.go b/api/controllers/course.go
index 3b090e8..380b552 100644
--- a/api/controllers/course.go
+++ b/api/controllers/course.go
@@ -340,7 +340,7 @@ func courseProfessor(flag string, c *gin.Context) {
 		bson.D{{Key: "$replaceWith", Value: "$professors"}},
 		bson.D{{Key: "$group", Value: bson.D{ // Groups all documents by professords _id
 			{Key: "_id", Value: "$_id"},
-			{Key: "doc", Value: bson.D{{Key: "$first", Value: "$$ROOT"}}}, // Keeps first full document 
+			{Key: "doc", Value: bson.D{{Key: "$first", Value: "$$ROOT"}}}, // Keeps first full document
 		}}},
 		bson.D{{Key: "$replaceWith", Value: "$doc"}},
 		// keep order deterministic between calls

From 42163ed4f4baf6721e49389e8327665a958c2661 Mon Sep 17 00:00:00 2001
From: NathanP9000 <73033177+NathanP9000@users.noreply.github.com>
Date: Mon, 27 Oct 2025 17:31:17 -0500
Subject: [PATCH 3/4] No changes were made to my code besides the merge. I
 removed the errors import, since it is no longer needed.

---
 api/controllers/course.go | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/api/controllers/course.go b/api/controllers/course.go
index ab98aa8..cf50d06 100644
--- a/api/controllers/course.go
+++ b/api/controllers/course.go
@@ -2,7 +2,6 @@ package controllers
 
 import (
 	"context"
-	"errors"
 	"fmt"
 	"net/http"
 	"time"
@@ -29,7 +28,7 @@ var courseCollection *mongo.Collection = configs.GetCollection("courses")
 // @Param			subject_prefix			query		string								false	"The course's subject prefix"
 // @Param			title					query		string								false	"The course's title"
 // @Param			description				query		string								false	"The course's description"
-// @Param			school					query		string								false	"The course's school"
+// @Param			school					query		string			a					false	"The course's school"
 // @Param			credit_hours			query		string								false	"The number of credit hours awarded by successful completion of the course"
 // @Param			class_level				query		string								false	"The level of education that this course course corresponds to"
 // @Param			activity_type			query		string								false	"The type of class this course corresponds to"

From 8bac8429b0241fb49add73a2cdf8901cdc8c1781 Mon Sep 17 00:00:00 2001
From: NathanP9000 <73033177+NathanP9000@users.noreply.github.com>
Date: Mon, 27 Oct 2025 17:46:53 -0500
Subject: [PATCH 4/4] Remove typo in @Param notation.

---
 api/controllers/course.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/api/controllers/course.go b/api/controllers/course.go
index cf50d06..e4e3e6b 100644
--- a/api/controllers/course.go
+++ b/api/controllers/course.go
@@ -28,7 +28,7 @@ var courseCollection *mongo.Collection = configs.GetCollection("courses")
 // @Param			subject_prefix			query		string								false	"The course's subject prefix"
 // @Param			title					query		string								false	"The course's title"
 // @Param			description				query		string								false	"The course's description"
-// @Param			school					query		string			a					false	"The course's school"
+// @Param			school					query		string								false	"The course's school"
 // @Param			credit_hours			query		string								false	"The number of credit hours awarded by successful completion of the course"
 // @Param			class_level				query		string								false	"The level of education that this course course corresponds to"
 // @Param			activity_type			query		string								false	"The type of class this course corresponds to"