added some new features. (Showing student's reviews and courses, Show course reviews, Show Top Courses with a tag or in a category, skipping optional fields when creating entity)
This commit is contained in:
Hosein
+141
-2
@@ -227,6 +227,44 @@ class Students(BaseRepository):
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return cls._execute_mutation(mutation, "deleteStudent")
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@classmethod
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def getStudentCourses(cls, student_id):
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def query(cursor):
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cursor.execute(
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f"""
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SELECT
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c.id,
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c.name
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FROM courses c
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JOIN course_enrolments ce ON ce.course_id = c.id
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JOIN students s ON s.id = ce.student_id
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WHERE s.id = %s
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""", (student_id,)
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)
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result = cursor.fetchall()
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return result if result else None
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return cls._execute_query(query, 'getStudentCourses')
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@classmethod
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def getStudentReviews(cls, student_id):
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def query(cursor):
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cursor.execute(
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f"""
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SELECT r.body review, r.rate, s.name student_name, c.name course_name, r.created_at, r.updated_at
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FROM reviews r
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JOIN course_enrolments ce ON ce.id = r.enrolment_id
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JOIN students s ON s.id = ce.student_id
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JOIN courses c ON c.id = ce.course_id
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WHERE s.id = %s
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LIMIT (3)
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""", (student_id,)
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)
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result = cursor.fetchall()
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return result if result else None
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return cls._execute_query(query, 'getStudentReviews')
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class Teachers(BaseRepository):
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table_name = "teachers"
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@@ -302,7 +340,31 @@ class Courses(BaseRepository):
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def getCourseById(cls, course_id):
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def query(cursor):
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cursor.execute(
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f"SELECT id, name, created_at, teacher_id, updated_at, description, difficulty, language FROM {cls.table_name} WHERE id = %s", (course_id, ))
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f"""
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SELECT
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id,
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name,
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created_at,
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teacher_id,
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updated_at,
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description,
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difficulty,
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language,
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r.avg_rate
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FROM
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courses
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LEFT JOIN (
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SELECT
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ce.course_id,
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ROUND(AVG(r.rate), 2) avg_rate
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FROM course_enrolments ce
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JOIN reviews r ON r.enrolment_id = ce.id
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GROUP BY ce.course_id
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) r ON r.course_id = courses.id
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WHERE
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id = %s
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""", (course_id, ))
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result = cursor.fetchall()
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return result[0] if result else None
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@@ -339,6 +401,23 @@ class Courses(BaseRepository):
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return cls._execute_mutation(mutation, "deleteCourse")
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@classmethod
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def getCourseReviews(cls, course_id):
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def query(cursor):
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cursor.execute(f"""
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SELECT r.body review, r.rate, s.name student_name, c.name course_name, r.created_at, r.updated_at
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FROM reviews r
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JOIN course_enrolments ce ON ce.id = r.enrolment_id
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JOIN courses c ON c.id = ce.course_id
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JOIN students s ON s.id = ce.student_id
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WHERE c.id = %s
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LIMIT (3)
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""", (course_id,))
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result = cursor.fetchall()
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return result if result else None
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return cls._execute_query(query, 'getCourseReviews')
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class Tags(BaseRepository):
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table_name = "tags"
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@@ -393,6 +472,36 @@ class Tags(BaseRepository):
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return cls._execute_mutation(mutation, "deleteTag")
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@classmethod
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def getTopCoursesByTag(cls, tag_id):
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def query(cursor):
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cursor.execute(
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"""
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SELECT
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cs.id,
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cs.name course_name,
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avg(r.rate) avg_rate
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FROM
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tags t
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JOIN course_tags ct ON t.id = ct.tag_id
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JOIN courses cs ON cs.id = ct.course_id
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JOIN course_enrolments ce ON cs.id = ce.course_id
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JOIN reviews r ON ce.id = r.enrolment_id
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WHERE
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t.id = %s
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GROUP BY
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cs.id,
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cs.name
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ORDER BY
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avg_rate DESC
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LIMIT
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(5)
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""", (tag_id, ))
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result = cursor.fetchall()
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return result if result else None
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return cls._execute_query(query, "getTopCoursesByTag")
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class Categories(BaseRepository):
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table_name = "categories"
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@@ -408,7 +517,7 @@ class Categories(BaseRepository):
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return cls._execute_query(query, "getAllCategories")
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@classmethod
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def getCategorieById(cls, category_id):
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def getCategoryById(cls, category_id):
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def query(cursor):
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cursor.execute(f"""
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SELECT c1.id, c1.name, c1.description,
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@@ -452,3 +561,33 @@ class Categories(BaseRepository):
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f"DELETE FROM {cls.table_name} WHERE id = %s", (category_id,))
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return cls._execute_mutation(mutation, "deleteCategory")
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@classmethod
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def getTopCoursesByCategory(cls, category_id):
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def query(cursor):
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cursor.execute(
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"""
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SELECT
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cs.id,
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cs.name course_name,
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avg(r.rate) avg_rate
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FROM
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categories c
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JOIN course_categories cc ON c.id = cc.category_id
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JOIN courses cs ON cc.course_id = cs.id
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JOIN course_enrolments ce ON cs.id = ce.course_id
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JOIN reviews r ON ce.id = r.enrolment_id
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WHERE
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c.id = %s
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GROUP BY
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cs.id,
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cs.name
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ORDER BY
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avg_rate DESC
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LIMIT
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(5)
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""", (category_id, ))
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result = cursor.fetchall()
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return result if result else None
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return cls._execute_query(query, "getTopCoursesByCategory")
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