python - Selecting distinct values from a column in Peewee -


i looking select values 1 column distinct using peewee.

for example if had table

 organization     year     company_1         2000  company_1         2001  company_2         2000  ....  

to return unique values in organization column [i.e.company_1 , company_2]

i had assumed possible using distinct option documented http://docs.peewee-orm.com/en/latest/peewee/api.html#selectquery.distinct

my current code:

   organizations_returned = organization_db.select().distinct(organization_db.organization_column).execute()      item in organizations_returned:          print (item.organization_column) 

does not result in distinct rows returned (it results in e.g. company_1 twice).

the other option tried:

  organization_db.select().distinct([organization_db.organization_column]).execute() 

included [ ] within disctinct option, although appearing more consistent documentation, resulted in error peewee.operationalerror: near "on": syntax error:

am correct in assume possible return unique values directly peewee - , if so, doing wrong?


model structure:

cd_sql = sqlitedatabase(sql_location, threadlocals=true, pragmas=(("synchronous", "off"),))       class basemodel(model):     class meta:         database = cd_sql  class organization_db(basemodel):     organization_column = charfield()     year_column = charfield() 

so coleifer getting @ sqlite doesn't support distinct on. that's not big issue though, think can accomplish want so:

organization_db.select(organization_db.organization).distinct()


Comments

Popular posts from this blog

c++ - llvm function pass ReplaceInstWithInst malloc -

Cross-Compiling Linux Kernel for Raspberry Pi - ${CCPREFIX}gcc -v does not work -

java.lang.NoClassDefFoundError When Creating New Android Project -