python - Sqlalchemy: Get some columns aliased -

-

i have question i'm sure it's quick answer, haven't been able find googling...

i have class product defined declarative sqlalchemy:

class product(declarativebase):     __tablename__ = "products"     _brand = column("brand", unicode(128))     _series = column("series", string(128))     _price = column("price", float)     _description = column("description", unicodetext)      _manufacturerid = column("manufacturer_id", integer, foreignkey("manufacturers.id"), key="manufacturerid")     _manufacturer = relationship("manufacturer",         uselist=false,          backref=backref("_products", collection_class=set)          )

and a point, want columns of products, such _brand , _manufacturerid, instead of retrieving named _manufacturerid want called _manufacturer (mainly "hide" relationship thing).

i don't know how that... like:

session.query(product.product._brand, product.product._manufacturerid "_manufacturer").all()

i'm pretty sure doable, don't know how (using sqlalchemy 0.6.6, in case it's relevant)

thank much!

actually... think "label" may work.

how put sqlalchemy label on result of arithmetic expression?

if does, i'll detail here


Comments

Post a Comment

Popular posts from this blog

c# - how to write client side events functions for the combobox items -

-
<dx:aspxcombobox id="aspxcombobox2" runat="server" clientidmode="autoid" selectedindex="-1" onselectedindexchanged="aspxcombobox1_selectedindexchanged1" > <clientsideevents selectedindexchanged="function(s, e) { grid.selectrows();}" /> <items> <dx:listedititem text="selecte rows" /> <dx:listedititem text="unselectall" /> </items> </dx:aspxcombobox> i want write event "unselect all" item in combobox. how can this? you'll need write javascript function iterates thru combo-box , marks selected items false. see select/unselect checkbox fields using pure javascript , html sample code msdn:
Read more

exception - Python, pyPdf OCR error: pyPdf.utils.PdfReadError: EOF marker not found -

-
pypdf throws exception: pypdf.utils.pdfreaderror: eof marker not found i don't need fix pypdf, need eof error cause "except" block execute , skip on file, doesn't work. still causes program stop running. background: batch ocr program pdfs python, pypdf, adobe pdf ocr error: unsupported filter /lzwdecode ... saga continues. i got 10,000 pdfs in folder. ocrd, not. can't tell 'em apart. step 1 figure out ones not ocrd , ocr (see other threads details). so i'm using pypdf. exceptions related unrecognized characters , unsupported filters when try read text. guestimated if throws exception, it's got text in , doens't go in list. problem solved, right? so: pypdf import pdffilewriter, pdffilereader import sys, os, pypdf, re path = 'c:\users\homer\documents\my pdfs' filelist = os.listdir(path) has_text_list = [] does_not_have_text_list = [] pdf_name in filelist: pdf_file
Read more