Added table selected_user for ticket 319.

We now store a user's selected_user so they see a filtered list of studies when returning to the PB Mock homepage

migrations/versions/6c34576847ab_.py

@@ -0,0 +1,28 @@
+"""empty message
+
+Revision ID: 6c34576847ab
+Revises: c14ddab2e6ca
+Create Date: 2021-05-11 11:10:14.725089
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '6c34576847ab'
+down_revision = 'c14ddab2e6ca'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    op.create_table('selected_user',
+    sa.Column('user_id', sa.String(), nullable=False),
+    sa.Column('selected_user', sa.String(), nullable=True),
+    sa.PrimaryKeyConstraint('user_id')
+    )
+
+
+def downgrade():
+    op.drop_table('selected_user')

pb/models.py

@@ -281,9 +281,19 @@ class StudyDetails(db.Model):
     REVIEWTYPENAME = db.Column(db.String, nullable=True)
 
 
-
 class StudyDetailsSchema(ma.SQLAlchemyAutoSchema):
     class Meta:
         model = StudyDetails
         load_instance = True
         include_relationships = False
+
+
+class SelectedUser(db.Model):
+    user_id = db.Column(db.String(), primary_key=True)
+    selected_user = db.Column(db.String(), nullable=True)
+
+
+class SelectedUserSchema(ma.Schema):
+    class Meta:
+        fields = ("user_id", "selected_user")
+