Adjustment in travis ci configs. Fix importing during first time running db upgrade

.travis.yml

@@ -2,11 +2,19 @@ language: python
 python:
   - "3.5.2"
 before_install:
+  - 'sudo apt-key adv --fetch-keys http://dl.yarnpkg.com/debian/pubkey.gpg'
+  - 'echo "deb http://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list'
   - 'travis_retry sudo apt-get update'
-  - 'travis_retry sudo apt-get install python3-dev libxml2-dev libxmlsec1-dev'
+  - 'travis_retry sudo apt-get install python3-dev libxml2-dev libxmlsec1-dev yarn'
 install:
   - pip install -r requirements.txt
 before_script:
-  - mv  config_template.py config.py
+  - mv config_template.py config.py
+  - export FLASK_APP=app/__init__.py
+  - flask db upgrade
+  - yarn install --pure-lockfile
+  - flask assets build
 script:
   - sh run_travis.sh
+cache:
+  yarn: true

app/__init__.py

@@ -4,6 +4,7 @@ from flask_login import LoginManager
 from flask_sqlalchemy import SQLAlchemy as SA
 from flask_migrate import Migrate
 from flask_oauthlib.client import OAuth
+from sqlalchemy.exc import OperationalError
 
 # subclass SQLAlchemy to enable pool_pre_ping
 class SQLAlchemy(SA):
@@ -35,4 +36,9 @@ if app.config.get('SAML_ENABLED') and app.config.get('SAML_ENCRYPT'):
     if not certutil.check_certificate():
         certutil.create_self_signed_cert()
 
-from app import models, views
+from app import models
+
+try:
+    from app import views
+except OperationalError:
+    logging.error("You have not initialized the DB yet or DB migration is running...")

app/templates/domain.html

@@ -267,7 +267,7 @@
             applyChanges({'domain': domain}, $SCRIPT_ROOT + '/domain/' + domain + '/update');
     });
 
-    {% if SETTING.get('record_helper_setting') %}
+    {% if SETTING.get('record_helper') %}
     //handle wacky record types
     $(document.body).on("focus", "#current_edit_record_data", function (e) {
         var record_type = $(this).parents("tr").find('#record_type').val();

migrations/versions/59729e468045_add_view_column_to_setting_table.py

@@ -77,6 +77,11 @@ def upgrade():
 
 def downgrade():
     # ### commands auto generated by Alembic - please adjust! ###
+    ## NOTE:
+    ##  - Drop action does not work on sqlite3
+    ##  - This action touchs the `setting` table which loaded in views.py
+    ##    during app initlization, so the downgrade function won't work
+    ##    unless we temporary remove importing `views` from `app/__init__.py`
     op.drop_column('setting', 'view')
 
     # delete added records in previous version