Fix #1293 (error 500 on search without query)

cps/helper.py

@@ -780,6 +780,7 @@ def fill_indexpage(page, database, db_filter, order, *join):
 
 
 def get_typeahead(database, query, replace=('',''), tag_filter=true()):
+    query = query or ''
     db.session.connection().connection.connection.create_function("lower", 1, lcase)
     entries = db.session.query(database).filter(tag_filter).filter(func.lower(database.name).ilike("%" + query + "%")).all()
     json_dumps = json.dumps([dict(name=r.name.replace(*replace)) for r in entries])

cps/web.py

@@ -465,42 +465,39 @@ def get_comic_book(book_id, book_format, page):
 # ################################### Typeahead ##################################################################
 
 
-@web.route("/get_authors_json")
+@web.route("/get_authors_json", methods=['GET'])
 @login_required_if_no_ano
 def get_authors_json():
-    if request.method == "GET":
     return get_typeahead(db.Authors, request.args.get('q'), ('|', ','))
 
 
-@web.route("/get_publishers_json")
+@web.route("/get_publishers_json", methods=['GET'])
 @login_required_if_no_ano
 def get_publishers_json():
-    if request.method == "GET":
     return get_typeahead(db.Publishers, request.args.get('q'), ('|', ','))
 
 
-@web.route("/get_tags_json")
+
+@web.route("/get_tags_json", methods=['GET'])
 @login_required_if_no_ano
 def get_tags_json():
-    if request.method == "GET":
     return get_typeahead(db.Tags, request.args.get('q'),tag_filter=tags_filters())
 
 
-@web.route("/get_series_json")
+@web.route("/get_series_json", methods=['GET'])
 @login_required_if_no_ano
 def get_series_json():
-    if request.method == "GET":
     return get_typeahead(db.Series, request.args.get('q'))
 
 
-@web.route("/get_languages_json", methods=['GET', 'POST'])
+@web.route("/get_languages_json", methods=['GET'])
 @login_required_if_no_ano
 def get_languages_json():
-    if request.method == "GET":
+    query = (request.args.get('q') or '').lower()
-        query = request.args.get('q').lower()
     language_names = isoLanguages.get_language_names(get_locale())
     entries_start = [s for key, s in language_names.items() if s.lower().startswith(query.lower())]
     if len(entries_start) < 5:
+
         entries = [s for key, s in language_names.items() if query in s.lower()]
         entries_start.extend(entries[0:(5-len(entries_start))])
         entries_start = list(set(entries_start))
@@ -508,19 +505,18 @@ def get_languages_json():
     return json_dumps
 
 
-@web.route("/get_matching_tags", methods=['GET', 'POST'])
+@web.route("/get_matching_tags", methods=['GET'])
 @login_required_if_no_ano
 def get_matching_tags():
     tag_dict = {'tags': []}
-    if request.method == "GET":
     q = db.session.query(db.Books)
     db.session.connection().connection.connection.create_function("lower", 1, lcase)
-        author_input = request.args.get('author_name')
+    author_input = request.args.get('author_name') or ''
-        title_input = request.args.get('book_title')
+    title_input = request.args.get('book_title') or ''
-        include_tag_inputs = request.args.getlist('include_tag')
+    include_tag_inputs = request.args.getlist('include_tag') or ''
-        exclude_tag_inputs = request.args.getlist('exclude_tag')
+    exclude_tag_inputs = request.args.getlist('exclude_tag') or ''
-        include_extension_inputs = request.args.getlist('include_extension')
+    # include_extension_inputs = request.args.getlist('include_extension') or ''
-        exclude_extension_inputs = request.args.getlist('exclude_extension')
+    # exclude_extension_inputs = request.args.getlist('exclude_extension') or ''
     q = q.filter(db.Books.authors.any(func.lower(db.Authors.name).ilike("%" + author_input + "%")),
                  func.lower(db.Books.title).ilike("%" + title_input + "%"))
     if len(include_tag_inputs) > 0: