add gradings in schema and entities

src/main/java/de/unistuttgart/iste/meitrex/assignment_service/persistence/entity/ExerciseGradingEntity.java

@@ -0,0 +1,42 @@
+package de.unistuttgart.iste.meitrex.assignment_service.persistence.entity;
+
+import jakarta.persistence.*;
+import lombok.*;
+
+import java.io.Serializable;
+import java.util.List;
+import java.util.UUID;
+
+@Entity(name = "ExerciseGrading")
+@Data
+@Builder
+@NoArgsConstructor
+@AllArgsConstructor
+public class ExerciseGradingEntity {
+
+    @EmbeddedId
+    private PrimaryKey primaryKey;
+
+    @Column(nullable = false)
+    private double achievedCredits;
+
+    @Column(nullable = false)
+    @OneToMany(cascade = CascadeType.ALL, orphanRemoval = true, mappedBy = "parentExerciseGrading")
+    private List<SubexerciseGradingEntity> subexerciseGradings;
+
+    @ManyToOne
+    @EqualsAndHashCode.Exclude
+    @ToString.Exclude
+    private GradingEntity parentGrading;
+
+    @Data
+    @Embeddable
+    @NoArgsConstructor
+    @AllArgsConstructor
+    public static class PrimaryKey implements Serializable {
+        private UUID assessmentId;
+        private UUID userId;
+
+    }
+
+}

src/main/java/de/unistuttgart/iste/meitrex/assignment_service/persistence/entity/GradingEntity.java

@@ -0,0 +1,46 @@
+package de.unistuttgart.iste.meitrex.assignment_service.persistence.entity;
+
+
+import de.unistuttgart.iste.meitrex.generated.dto.ExerciseGrading;
+import jakarta.persistence.*;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import java.io.Serializable;
+import java.time.OffsetDateTime;
+import java.util.List;
+import java.util.UUID;
+
+@Entity(name = "Grading")
+@Data
+@Builder
+@NoArgsConstructor
+@AllArgsConstructor
+public class GradingEntity {
+
+    @EmbeddedId
+    private PrimaryKey primaryKey;
+
+    @Column(nullable = false)
+    private OffsetDateTime date;
+
+    @Column(nullable = false)
+    private double achievedCredits;
+
+    @Column(nullable = false)
+    @OneToMany(cascade = CascadeType.ALL, orphanRemoval = true, mappedBy = "parentGrading")
+    private List<ExerciseGradingEntity> exerciseGradings;
+
+    @Data
+    @Embeddable
+    @NoArgsConstructor
+    @AllArgsConstructor
+    public static class PrimaryKey implements Serializable {
+        private UUID assessmentId;
+        private UUID userId;
+
+    }
+
+}

src/main/java/de/unistuttgart/iste/meitrex/assignment_service/persistence/entity/SubexerciseGradingEntity.java

@@ -0,0 +1,36 @@
+package de.unistuttgart.iste.meitrex.assignment_service.persistence.entity;
+
+import jakarta.persistence.*;
+import lombok.*;
+
+import java.io.Serializable;
+import java.util.UUID;
+
+@Entity(name = "SubexerciseGrading")
+@Data
+@Builder
+@NoArgsConstructor
+@AllArgsConstructor
+public class SubexerciseGradingEntity {
+
+    @EmbeddedId
+    private PrimaryKey primaryKey;
+
+    @Column(nullable = false)
+    private double achievedCredits;
+
+    @ManyToOne
+    @EqualsAndHashCode.Exclude
+    @ToString.Exclude
+    private GradingEntity parentExerciseGrading;
+
+    @Data
+    @Embeddable
+    @NoArgsConstructor
+    @AllArgsConstructor
+    public static class PrimaryKey implements Serializable {
+        private UUID assessmentId;
+        private UUID userId;
+
+    }
+}

src/main/resources/graphql/service/grading.graphqls

@@ -0,0 +1,68 @@
+"""
+A grading contains a user's achieved credits on an assignment and its exercises and subexercises.
+"""
+type Grading {
+    """
+    ID of the assignment.
+    """
+    assessmentId: UUID!
+
+    """
+    ID of the user the grading belongs to.
+    """
+    userId: UUID!
+
+    """
+    The date and time of when the tutor corrected the assignment.
+    """
+    date: DateTime!
+
+    """
+    The absolute number of achieved credits on the assignment.
+    """
+    achievedCredits: Float!
+
+    """
+    List of exercise-gradings for each exercise in the assignment. Can be empty, if there are no exercises within the assignment.
+    """
+    exerciseGradings: [ExerciseGrading]!
+}
+
+type ExerciseGrading {
+    """
+    ID of the exercise.
+    """
+    itemId: UUID!
+
+    """
+    ID of the user the exercise-grading belongs to.
+    """
+    userId: UUID!
+
+    """
+    The absolute number of achieved credits on the exercise.
+    """
+    achievedCredits: Float!
+
+    """
+    List of subexercise-gradings for each subexercise in the exercise. Can be empty, if there are no subexercises within the exercise.
+    """
+    subexerciseGradings: [SubexerciseGrading]!
+}
+
+type SubexerciseGrading {
+    """
+    ID of the subexercise.
+    """
+    itemId: UUID!
+
+    """
+    ID of the user the subexercise-grading belongs to.
+    """
+    userId: UUID!
+
+    """
+    The absolute number of achieved credits on the subexercise.
+    """
+    achievedCredits: Float!
+}

src/main/resources/graphql/service/query.graphqls

@@ -6,4 +6,12 @@ type Query {
     an assignment if the user has no access to it.
     """
     findAssignmentsByAssessmentIds(assessmentIds: [UUID!]!): [Assignment]!
+
+
+    """
+    Get a grading for one assignment for one student
+    🔒 The user must be enrolled in the course the assignment belong to to access them. Otherwise null is returned for
+    an assignment if the user has no access to it.
+    """
+    getGradingForAssignmentForStudent(assessmentId: UUID!, userId: UUID!): Grading!
 }