Feat: Create shortlisting model

app/models/__init__.py

 from .administration import *
 from .project import *
+from .shortlist import *

app/models/shortlist.py

+from sqlalchemy import Sequence
+
+from ..database import db
+
+RANKING_SEQUENCE = Sequence("shortlisting_ranking_seq")
+
+
+class Shortlisting(db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    project_id = db.Column(db.Integer, db.ForeignKey("project.id"), nullable=False)
+    student = db.Column(db.String)
+    ranking = db.Column(
+        db.Integer,
+        RANKING_SEQUENCE,
+        server_default=RANKING_SEQUENCE.next_value(),
+        nullable=False,
+    )

app/templates/pages/student/projects.html

@@ -10,7 +10,7 @@
                     <div class="w3-display-right">
                         <a href="{{ url_for("student.view_project", project_id=project.id) }}"
                            class="w3-button w3-hover-blue">View</a>
-                        <a href=""
+                        <a href="{{ url_for("student.shortlist_project", project_id=project.id) }}"
                            class="w3-button w3-hover-blue">Shortlist</a>
                     </div>
                 </li>

app/views/student.py

 from flask import render_template, Blueprint, redirect, url_for, flash
-from flask_login import login_required
+from flask_login import login_required, current_user
 
-from app import Project, messages
+from app import Project, messages, Shortlisting, db
 
 bp = Blueprint("student", __name__, url_prefix="/student")
 
@@ -22,3 +22,17 @@ def view_project(project_id):
         return render_template("pages/student/project-view.html", project=project)
     flash(messages.PROJECT_NOT_FOUND)
     return redirect(url_for("student.projects"))
+
+
+@bp.route("/projects/<project_id>/shortlist")
+@login_required
+def shortlist_project(project_id):
+    if Project.query.get(project_id):
+        shortlisting = Shortlisting(
+            student=current_user.username, project_id=project_id
+        )
+        db.session.add(shortlisting)
+        db.session.commit()
+    else:
+        flash(messages.PROJECT_NOT_FOUND)
+    return redirect(url_for("student.projects"))

migrations/versions/d009c2b07eed_add_shortlisting_table.py

+"""Add shortlisting table
+
+Revision ID: d009c2b07eed
+Revises: 6dea3a5014b0
+Create Date: 2022-08-23 15:08:42.796055
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+from sqlalchemy import Sequence
+from sqlalchemy.sql.ddl import CreateSequence, DropSequence
+
+revision = "d009c2b07eed"
+down_revision = "6dea3a5014b0"
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.execute(CreateSequence(Sequence("shortlisting_ranking_seq")))
+    op.create_table(
+        "shortlisting",
+        sa.Column("id", sa.Integer(), nullable=False),
+        sa.Column("project_id", sa.Integer(), nullable=False),
+        sa.Column("student", sa.String(), nullable=True),
+        sa.Column(
+            "ranking",
+            sa.Integer(),
+            server_default=sa.text("nextval('shortlisting_ranking_seq')"),
+            nullable=False,
+        ),
+        sa.ForeignKeyConstraint(
+            ["project_id"],
+            ["project.id"],
+        ),
+        sa.PrimaryKeyConstraint("id"),
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_table("shortlisting")
+    op.execute(DropSequence(Sequence("shortlisting_ranking_seq")))
+    # ### end Alembic commands ###