def downgrade():
with op.batch_alter_table('dashboards') as batch_op:
batch_op.alter_column(
'position_json',
existing_type=MediumText(),
type_=sa.Text(),
existing_nullable=True,
)
class Dashboard(Model, AuditMixinNullable, ImportMixin):
"""The dashboard object!"""
__tablename__ = 'dashboards'
id = Column(Integer, primary_key=True)
dashboard_title = Column(String(500))
position_json = Column(MediumText())
description = Column(Text)
css = Column(Text)
json_metadata = Column(Text)
slug = Column(String(255), unique=True)
slices = relationship('Slice',
secondary=dashboard_slices,
backref='dashboards')
owners = relationship(security_manager.user_model,
secondary=dashboard_user)
export_fields = ('dashboard_title', 'position_json', 'json_metadata',
'description', 'css', 'slug')
def __repr__(self):
return self.dashboard_title
@property
def table_names(self):
# pylint: disable=no-member
return ', '.join(
{'{}'.format(s.datasource.full_name)
for s in self.slices})
@property
def url(self):
if self.json_metadata:
# add default_filters to the preselect_filters of dashboard
json_metadata = json.loads(self.json_metadata)
default_filters = json_metadata.get('default_filters')
# make sure default_filters is not empty and is valid
if default_filters and default_filters != '{}':
try:
if json.loads(default_filters):
filters = parse.quote(default_filters.encode('utf8'))
return '/superset/dashboard/{}/?preselect_filters={}'.format(
self.slug or self.id, filters)
except Exception:
pass
return '/superset/dashboard/{}/'.format(self.slug or self.id)
@property
def datasources(self):
return {slc.datasource for slc in self.slices}
@property
def sqla_metadata(self):
# pylint: disable=no-member
metadata = MetaData(bind=self.get_sqla_engine())
return metadata.reflect()
def dashboard_link(self):
title = escape(self.dashboard_title)
return Markup('<a href="{self.url}">{title}</a>'.format(**locals()))
@property
def data(self):
positions = self.position_json
if positions:
positions = json.loads(positions)
return {
'id': self.id,
'metadata': self.params_dict,
'css': self.css,
'dashboard_title': self.dashboard_title,
'slug': self.slug,
'slices': [slc.data for slc in self.slices],
'position_json': positions,
}
@property
def params(self):
return self.json_metadata
@params.setter
def params(self, value):
self.json_metadata = value
@property
def position(self):
if self.position_json:
return json.loads(self.position_json)
return {}
@classmethod
def import_obj(cls, dashboard_to_import, import_time=None):
"""Imports the dashboard from the object to the database.
Once dashboard is imported, json_metadata field is extended and stores
remote_id and import_time. It helps to decide if the dashboard has to
be overridden or just copies over. Slices that belong to this
dashboard will be wired to existing tables. This function can be used
to import/export dashboards between multiple superset instances.
Audit metadata isn't copied over.
"""
def alter_positions(dashboard, old_to_new_slc_id_dict):
""" Updates slice_ids in the position json.
Sample position_json data:
{
"DASHBOARD_VERSION_KEY": "v2",
"DASHBOARD_ROOT_ID": {
"type": "DASHBOARD_ROOT_TYPE",
"id": "DASHBOARD_ROOT_ID",
"children": ["DASHBOARD_GRID_ID"]
},
"DASHBOARD_GRID_ID": {
"type": "DASHBOARD_GRID_TYPE",
"id": "DASHBOARD_GRID_ID",
"children": ["DASHBOARD_CHART_TYPE-2"]
},
"DASHBOARD_CHART_TYPE-2": {
"type": "DASHBOARD_CHART_TYPE",
"id": "DASHBOARD_CHART_TYPE-2",
"children": [],
"meta": {
"width": 4,
"height": 50,
"chartId": 118
}
},
}
"""
position_data = json.loads(dashboard.position_json)
position_json = position_data.values()
for value in position_json:
if (isinstance(value, dict) and value.get('meta')
and value.get('meta').get('chartId')):
old_slice_id = value.get('meta').get('chartId')
if old_slice_id in old_to_new_slc_id_dict:
value['meta']['chartId'] = (
old_to_new_slc_id_dict[old_slice_id])
dashboard.position_json = json.dumps(position_data)
logging.info('Started import of the dashboard: {}'.format(
dashboard_to_import.to_json()))
session = db.session
logging.info('Dashboard has {} slices'.format(
len(dashboard_to_import.slices)))
# copy slices object as Slice.import_slice will mutate the slice
# and will remove the existing dashboard - slice association
slices = copy(dashboard_to_import.slices)
old_to_new_slc_id_dict = {}
new_filter_immune_slices = []
new_timed_refresh_immune_slices = []
new_expanded_slices = {}
i_params_dict = dashboard_to_import.params_dict
remote_id_slice_map = {
slc.params_dict['remote_id']: slc
for slc in session.query(Slice).all()
if 'remote_id' in slc.params_dict
}
for slc in slices:
logging.info('Importing slice {} from the dashboard: {}'.format(
slc.to_json(), dashboard_to_import.dashboard_title))
remote_slc = remote_id_slice_map.get(slc.id)
new_slc_id = Slice.import_obj(slc,
remote_slc,
import_time=import_time)
old_to_new_slc_id_dict[slc.id] = new_slc_id
# update json metadata that deals with slice ids
new_slc_id_str = '{}'.format(new_slc_id)
old_slc_id_str = '{}'.format(slc.id)
if ('filter_immune_slices' in i_params_dict and old_slc_id_str
in i_params_dict['filter_immune_slices']):
new_filter_immune_slices.append(new_slc_id_str)
if ('timed_refresh_immune_slices' in i_params_dict
and old_slc_id_str
in i_params_dict['timed_refresh_immune_slices']):
new_timed_refresh_immune_slices.append(new_slc_id_str)
if ('expanded_slices' in i_params_dict
and old_slc_id_str in i_params_dict['expanded_slices']):
new_expanded_slices[new_slc_id_str] = (
i_params_dict['expanded_slices'][old_slc_id_str])
# override the dashboard
existing_dashboard = None
for dash in session.query(Dashboard).all():
if ('remote_id' in dash.params_dict and
dash.params_dict['remote_id'] == dashboard_to_import.id):
existing_dashboard = dash
dashboard_to_import.id = None
alter_positions(dashboard_to_import, old_to_new_slc_id_dict)
dashboard_to_import.alter_params(import_time=import_time)
if new_expanded_slices:
dashboard_to_import.alter_params(
expanded_slices=new_expanded_slices)
if new_filter_immune_slices:
dashboard_to_import.alter_params(
filter_immune_slices=new_filter_immune_slices)
if new_timed_refresh_immune_slices:
dashboard_to_import.alter_params(
timed_refresh_immune_slices=new_timed_refresh_immune_slices)
new_slices = session.query(Slice).filter(
Slice.id.in_(old_to_new_slc_id_dict.values())).all()
if existing_dashboard:
existing_dashboard.override(dashboard_to_import)
existing_dashboard.slices = new_slices
session.flush()
return existing_dashboard.id
else:
# session.add(dashboard_to_import) causes sqlachemy failures
# related to the attached users / slices. Creating new object
# allows to avoid conflicts in the sql alchemy state.
copied_dash = dashboard_to_import.copy()
copied_dash.slices = new_slices
session.add(copied_dash)
session.flush()
return copied_dash.id
@classmethod
def export_dashboards(cls, dashboard_ids):
copied_dashboards = []
datasource_ids = set()
for dashboard_id in dashboard_ids:
# make sure that dashboard_id is an integer
dashboard_id = int(dashboard_id)
copied_dashboard = (db.session.query(Dashboard).options(
subqueryload(
Dashboard.slices)).filter_by(id=dashboard_id).first())
make_transient(copied_dashboard)
for slc in copied_dashboard.slices:
datasource_ids.add((slc.datasource_id, slc.datasource_type))
# add extra params for the import
slc.alter_params(
remote_id=slc.id,
datasource_name=slc.datasource.name,
schema=slc.datasource.name,
database_name=slc.datasource.database.name,
)
copied_dashboard.alter_params(remote_id=dashboard_id)
copied_dashboards.append(copied_dashboard)
eager_datasources = []
for dashboard_id, dashboard_type in datasource_ids:
eager_datasource = ConnectorRegistry.get_eager_datasource(
db.session, dashboard_type, dashboard_id)
eager_datasource.alter_params(
remote_id=eager_datasource.id,
database_name=eager_datasource.database.name,
)
make_transient(eager_datasource)
eager_datasources.append(eager_datasource)
return json.dumps(
{
'dashboards': copied_dashboards,
'datasources': eager_datasources,
},
cls=utils.DashboardEncoder,
indent=4)