if you have an Enum with a certain name that is to be used in multiple
tables, you can create it separately. Build the ENUM using the
create_type=False flag to keep it from generating the type
automatically, then use the .create() method to create it individually,
docs at
http://docs.sqlalchemy.org/en/rel_1_0/dialects/postgresql.html?highlight=enum#sqlalchemy.dialects.postgresql.ENUM.
Alternatively, if you don't mind the extra overhead, run all your
table.create() calls with checkfirst=True. This should run a
"checkfirst" query not just for the table itself but also for the ENUM
types contained within.
On 08/22/2016 04:03 PM, Fran Goitia wrote:
Models FacebookPost and TwitterPost share an enum called types. This
enum is correctly created when creating facebook_posts table, but when
trying to create twitter_posts table, there is an attempt to recreate
this type which results in an error.
|
sqlalchemy.exc.ProgrammingError:(psycopg2.ProgrammingError)type
"types"already exists
[SQL:"CREATE TYPE types AS ENUM ('Video', 'GIF', 'Scratch Reel',
'Card', 'Video Card', 'Text', 'Photo', 'Shared Article', 'Reply',
'Canvas', 'Carousel', 'Video Carousel', 'Link', 'Status')"]
|
This is the way I'm creating the database. I can't use
Base.metadata.create_all, because I need to be explicit in terms of what
tables are created
|
Engine=create_engine(db_url,echo=False)
Campaign.__table__.create(Engine)
SubCampaign.__table__.create(Engine)
Creative.__table__.create(Engine)
Hashtag.__table__.create(Engine)
FacebookPost.__table__.create(Engine)
TwitterPost.__table__.create(Engine)
|
I'm creating the enums this way:
|
fromsqlalchemy importEnum
types =('Video','GIF','Scratch Reel','Card','Video Card',
'Text','Photo','Shared Article','Reply','Canvas',
'Carousel','Video Carousel','Link','Status')
goals =('CTR','ER','Awareness','CPGA')
sources =('Facebook','Twitter','Instagram','Tumblr')
vars_ =locals().copy()
fork,v invars_.items():
ifisinstance(v,tuple):
locals()[k]=Enum(*v,name=k)
|
Thanks
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