first commit for removing books from a loan itself, works and the scaffold is there for adding new books, code to be written

main.py

@@ -232,7 +232,11 @@ book_schema = BookSchema()
 def search():
     books = Book.query.filter(Book.title.ilike("%{}%".format(request.form['term']))).all()
     AddSubs(books)
-    return render_template("books.html", books=books)
+    if 'InDBox' in request.form:
+        InDBox=1
+    else:
+        InDBox=0
+    return render_template("books.html", books=books, InDBox=InDBox)
 
 @app.route("/books", methods=["GET"])
 def books():
@@ -240,10 +244,14 @@ def books():
     AddSubs(books)
     return render_template("books.html", books=books )
 
-@app.route("/books_for_loan/<id>", methods=["GET"])
+@app.route("/books_for_loan/<id>", methods=["GET", "POST"])
 def books_for_loan(id):
     books = Book.query.join(Book_Loan_Link).filter(Book_Loan_Link.loan_id==id).order_by(Book.id).all()
-    return render_template("books_for_loan.html", books=books)
+    if request.method == 'POST':
+        InDBox=1
+    else:
+        InDBox=0
+    return render_template("books_for_loan.html", books=books, loan_id=id, InDBox=InDBox)
 
 @app.route("/books_for_series/<id>", methods=["GET", "POST"])
 def books_for_series(id):
@@ -551,6 +559,21 @@ def stats():
     stats.append( GetCount( "Num all Books unrated", "rating in (select id from rating where name in ('N/A', 'Undefined'))" ) )
     return render_template("stats.html", stats=stats )
 
+@app.route("/rem_books_from_loan/<id>", methods=["POST"])
+def rem_books_from_loan(id):
+    print( "rem_books_from_loan for loan: {}".format( id ) )
+    for field in request.form:
+        rem_id=int(re.findall( '\d+', field )[0])
+        print( "field: {} -- so removing book id: {}".format( field, rem_id ) )
+        try:
+            db.engine.execute("delete from book_loan_link where book_id = {} and loan_id = {}".format( rem_id, id ))
+            db.session.commit()
+        except:
+            st.SetAlert("danger")
+            st.SetMessage("Failed to remove books from loan!")
+
+    print( "now redirect to /loan/{}".format(id) )
+    return redirect("/loan/{}".format(id))
 
 @app.route("/", methods=["GET"])
 def main_page():