附件成绩和成绩回传

Python

在构建 attachment 对象时添加 maxPoints 字段，紧接着向 courses.courseWork.addOnAttachments 端点发出 CREATE 请求。如果您按照我们提供的示例操作，则可以在 webapp/attachment_routes.py 文件中找到此值。

attachment = {
    # Specifies the route for a teacher user.
    "teacherViewUri": {
        "uri":
            flask.url_for(
                "load_activity_attachment",
                _scheme='https',
                _external=True),
    },
    # Specifies the route for a student user.
    "studentViewUri": {
        "uri":
            flask.url_for(
                "load_activity_attachment",
                _scheme='https',
                _external=True)
    },
    # Specifies the route for a teacher user when the attachment is
    # loaded in the Classroom grading view.
    "studentWorkReviewUri": {
        "uri":
            flask.url_for(
                "view_submission", _scheme='https', _external=True)
    },
    # Sets the maximum points that a student can earn for this activity.
    # This is the denominator in a fractional representation of a grade.
    "maxPoints": 50,
    # The title of the attachment.
    "title": f"Attachment {attachment_count}",
}

Python

首先，向 Attachment 表添加 max_points 字段。如果您按照我们提供的示例操作，则可以在 webapp/models.py 文件中找到此值。

# Database model to represent an attachment.
class Attachment(db.Model):
    # The attachmentId is the unique identifier for the attachment.
    attachment_id = db.Column(db.String(120), primary_key=True)

    # The image filename to store.
    image_filename = db.Column(db.String(120))

    # The image caption to store.
    image_caption = db.Column(db.String(120))

    # The maximum number of points for this activity.
    max_points = db.Column(db.Integer)

返回 courses.courseWork.addOnAttachments CREATE 请求。存储响应中返回的 maxPoints 值。

new_attachment = Attachment(
    # The new attachment's unique ID, returned in the CREATE response.
    attachment_id=resp.get("id"),
    image_filename=key,
    image_caption=value,
    # Store the maxPoints value returned in the response.
    max_points=int(resp.get("maxPoints")))
db.session.add(new_attachment)
db.session.commit()

Python

在 webapp/attachment_routes.py 文件顶部找到 SET_GRADE_WITH_LOGGED_IN_USER_CREDENTIALS 声明。将此值设为 True 可使用已登录教师的凭据传回成绩。将此值设置为 False，以便在学生提交作业时使用存储的凭据传回成绩。

Python

# Look up the student's submission in our database.
student_submission = Submission.query.get(flask.session["submissionId"])

# Look up the attachment in the database.
attachment = Attachment.query.get(student_submission.attachment_id)

grade = 0

# See if the student response matches the stored name.
if student_submission.student_response.lower(
) == attachment.image_caption.lower():
    grade = attachment.max_points

# Create an instance of the Classroom service.
classroom_service = ch._credential_handler.get_classroom_service()

# Build an AddOnAttachmentStudentSubmission instance.
add_on_attachment_student_submission = {
    # Specifies the student's score for this attachment.
    "pointsEarned": grade,
}

# Issue a PATCH request to set the grade numerator for this attachment.
patch_grade_response = classroom_service.courses().courseWork(
).addOnAttachments().studentSubmissions().patch(
    courseId=flask.session["courseId"],
    itemId=flask.session["itemId"],
    attachmentId=flask.session["attachmentId"],
    submissionId=flask.session["submissionId"],
    # updateMask is a list of fields being modified.
    updateMask="pointsEarned",
    body=add_on_attachment_student_submission).execute()

Python

在我们提供的示例中，此值位于 webapp/models.py 文件中。

# Database model to represent a user.
class User(db.Model):
    # The user's identifying information:
    id = db.Column(db.String(120), primary_key=True)
    display_name = db.Column(db.String(80))
    email = db.Column(db.String(120), unique=True)
    portrait_url = db.Column(db.Text())

    # The user's refresh token, which will be used to obtain an access token.
    # Note that refresh tokens will become invalid if:
    # - The refresh token has not been used for six months.
    # - The user revokes your app's access permissions.
    # - The user changes passwords.
    # - The user belongs to a Google Cloud organization
    #   that has session control policies in effect.
    refresh_token = db.Column(db.Text())

    # An access token for this user.
    access_token = db.Column(db.Text())

Python

在我们提供的示例中，此值位于 webapp/credential_handler.py 文件中。

def save_credentials_to_storage(self, credentials):
    # Issue a request for the user's profile details.
    user_info_service = googleapiclient.discovery.build(
        serviceName="oauth2", version="v2", credentials=credentials)
    user_info = user_info_service.userinfo().get().execute()
    flask.session["username"] = user_info.get("name")
    flask.session["login_hint"] = user_info.get("id")

    # See if we have any stored credentials for this user. If they have used
    # the add-on before, we should have received login_hint in the query
    # parameters.
    existing_user = self.get_credentials_from_storage(user_info.get("id"))

    # If we do have stored credentials, update the database.
    if existing_user:
        if user_info:
            existing_user.id = user_info.get("id")
            existing_user.display_name = user_info.get("name")
            existing_user.email = user_info.get("email")
            existing_user.portrait_url = user_info.get("picture")

        if credentials and credentials.refresh_token is not None:
            existing_user.refresh_token = credentials.refresh_token
            # Update the access token.
            existing_user.access_token = credentials.token

    # If not, this must be a new user, so add a new entry to the database.
    else:
        new_user = User(
            id=user_info.get("id"),
            display_name=user_info.get("name"),
            email=user_info.get("email"),
            portrait_url=user_info.get("picture"),
            refresh_token=credentials.refresh_token,
            # Store the access token as well.
            access_token=credentials.token)

        db.session.add(new_user)

    db.session.commit()

Python

在我们提供的示例中，此值位于 webapp/models.py 文件中。

# Database model to represent an attachment.
class Attachment(db.Model):
    # The attachmentId is the unique identifier for the attachment.
    attachment_id = db.Column(db.String(120), primary_key=True)

    # The image filename to store.
    image_filename = db.Column(db.String(120))

    # The image caption to store.
    image_caption = db.Column(db.String(120))

    # The maximum number of points for this activity.
    max_points = db.Column(db.Integer)

    # The ID of the teacher that created the attachment.
    teacher_id = db.Column(db.String(120))

Python

在我们提供的示例中，此方法位于 webapp/attachment_routes.py 文件中的 create_attachments 方法中。

# Store the attachment by id.
new_attachment = Attachment(
    # The new attachment's unique ID, returned in the CREATE response.
    attachment_id=resp.get("id"),
    image_filename=key,
    image_caption=value,
    max_points=int(resp.get("maxPoints")),
    teacher_id=flask.session["login_hint"])
db.session.add(new_attachment)
db.session.commit()

Python

在我们提供的示例中，此方法位于 webapp/attachment_routes.py 文件中的 load_activity_attachment 方法中。

# Create an instance of the Classroom service using the tokens for the
# teacher that created the attachment.

# We're assuming that there are already credentials in the session, which
# should be true given that we are adding this within the Student View
# route; we must have had valid credentials for the student to reach this
# point. The student credentials will be valid to construct a Classroom
# service for another user except for the tokens.
if not flask.session.get("credentials"):
    raise ValueError(
        "No credentials found in session for the requested user.")

# Make a copy of the student credentials so we don't modify the original.
teacher_credentials_dict = deepcopy(flask.session.get("credentials"))

# Retrieve the requested user's stored record.
teacher_record = User.query.get(attachment.teacher_id)

# Apply the user's tokens to the copied credentials.
teacher_credentials_dict["refresh_token"] = teacher_record.refresh_token
teacher_credentials_dict["token"] = teacher_record.access_token

# Construct a temporary credentials object.
teacher_credentials = google.oauth2.credentials.Credentials(
    **teacher_credentials_dict)

# Refresh the credentials if necessary; we don't know when this teacher last
# made a call.
if teacher_credentials.expired:
    teacher_credentials.refresh(Request())

# Request the Classroom service for the specified user.
teacher_classroom_service = googleapiclient.discovery.build(
    serviceName=CLASSROOM_API_SERVICE_NAME,
    version=CLASSROOM_API_VERSION,
    credentials=teacher_credentials)

Python

# Issue a PATCH request as the teacher to set the grade numerator for this
# attachment.
patch_grade_response = teacher_classroom_service.courses().courseWork(
).addOnAttachments().studentSubmissions().patch(
    courseId=flask.session["courseId"],
    itemId=flask.session["itemId"],
    attachmentId=flask.session["attachmentId"],
    submissionId=flask.session["submissionId"],
    # updateMask is a list of fields being modified.
    updateMask="pointsEarned",
    body=add_on_attachment_student_submission).execute()