【发布时间】：2021-09-03 15:44:31
【问题描述】：
Exception on /viewreports [POST]
2021-06-19T01:55:40.057253+00:00 app[web.1]: Traceback (most recent call last):
packages/sqlalchemy/engine/base.py", line 1276, in _execute_context
-packages/sqlalchemy/engine/default.py", line 608, in do_execute
2021-06-19T01:55:40.057256+00:00 app[web.1]: cursor.execute(statement, parameters)
2021-06-19T01:55:40.057257+00:00 app[web.1]: psycopg2.errors.SyntaxError: syntax error at or near ")"
2021-06-19T01:55:40.057258+00:00 app[web.1]: LINE 1: ... ON usersport.sport_id=sport.sport_id WHERE sport_name=(?)
2021-06-19T01:55:40.057259+00:00 app[web.1]: The above exception was the direct cause of the following exception:
2021-06-19T01:55:40.057259+00:00 app[web.1]:
2021-06-19T01:55:40.057260+00:00 app[web.1]: Traceback (most recent call last):
2021-06-19T01:55:40.057275+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/flask/app.py", line 2447, in wsgi_app
2021-06-19T01:55:40.057275+00:00 app[web.1]: response = self.full_dispatch_request()
2021-06-19T01:55:40.057279+00:00 app[web.1]: File "/app/schoolsports/routes.py", line 269, in viewreports
2021-06-19T01:55:40.057285+00:00 app[web.1]: result1=db.engine.execute("SELECT user_id FROM usersport INNER JOIN sport ON usersport.sport_id=sport.sport_id WHERE sport_name=(?) ",(value))
2021-06-19T01:55:40.057289+00:00 app[web.1]: self.dialect.do_execute(
2021-06-19T01:55:40.057289+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/sqlalchemy/engine/default.py", line 608, in do_execute
2021-06-19T01:55:40.057290+00:00 app[web.1]: cursor.execute(statement, parameters)
2021-06-19T01:55:40.057290+00:00 app[web.1]: sqlalchemy.exc.ProgrammingError: (psycopg2.errors.SyntaxError) syntax error at or near ")"
2021-06-19T01:55:40.057290+00:00 app[web.1]: LINE 1: ... ON usersport.sport_id=sport.sport_id WHERE sport_name=(?)
2021-06-19T01:55:40.057290+00:00 app[web.1]: ^
2021-06-19T01:55:40.057291+00:00 app[web.1]:
2021-06-19T01:55:40.057291+00:00 app[web.1]: [SQL: SELECT user_id FROM usersport INNER JOIN sport ON usersport.sport_id=sport.sport_id WHERE sport_name=(?) ]
2021-06-19T01:55:40.057291+00:00 app[web.1]: [parameters: ('taekwondo',)]
2021-06-19T01:55:40.057291+00:00 app[web.1]: (Background on this error at: http://sqlalche.me/e/13/f405)
2021-06-19T01:55:40.058121+00:00 app[web.1]: 10.45.135.21 - - [19/Jun/2021:01:55:40 +0000] "POST /viewreports HTTP/1.1" 500 290 "https://mymodule.herokuapp.com/viewreports"
我已经将我的烧瓶网络应用程序部署到 Heroku，它最初使用 SQLite 本地数据库，我的所有命令都可以正常工作。现在，当我部署到 Heroku 并使用 PostgreSQL 数据库时，我遇到了一些语法和编程错误，如上所示。我没有在本地收到这些错误，现在当我部署时，我收到了这些错误。请指教，我的代码如下：
list2=[]
mainlist=[]
tables=""
finalreportlist=[]
excelbutton=False
if request.method=='POST':
sectionSelected=False
classSelected= False
houseselected=False
sectionwithoutclass=False
nostudentinlist=False
nosport=False
###checking whether a a class is selected in the form. Part of form processing
if request.form["class1"]!='all':
classSelected= True
##form data of class
formclass=(request.form["class1"])
##checking whether a section is entered ###
if request.form['section']!='all':
sectionSelected = True
###form data of seciton
formsection=(request.form["section"])
if request.form["house"] !='all':
houseselected= True
formhouse=(request.form["house"])
##get sport form data in a loop example first badminton\
if not request.form.getlist("sport"):
nosport=True
if request.form.getlist("sport") and (request.form.get("eventname")):
flash("Select either the sport or event. Not both",'danger')
else:
for value in request.form.getlist("sport"):
##getting user ids with given sport
result1=db.engine.execute("SELECT user_id FROM usersport INNER JOIN sport ON usersport.sport_id=sport.sport_id WHERE sport_name=(?) ",(value))
##adding all user ids to a list
for a in result1:
#print("a",a) # for appending user ids to a list
list2.append(a)
#getting all details of the user from that user table
query=db.engine.execute("SELECT grrno,firstname,lastname,House,Class,Section,Rollno FROM user WHERE user.id IN(?)" ,(a))
#iterating through users
######query is a list of all user details. b is going though each
for b in query:
#print("User id is",b)
#print("User name is",b.firstname)
##abc contnains each user full object with details 1 by 1
abc=b.items()
##contains dictionary of 1 isngle user looping
dictversion=(dict(abc))
#print("Selected class dictversion is",dictversion["Class"])
##data in the students class reocrd lika 1,2,3,4
classdata=dictversion["Class"]
##data in students secrion record like a,b,c,d
sectiondata=dictversion["Section"]
if classSelected==True and sectionSelected == True :
if int(classdata)==int(formclass) and formsection==sectiondata:
mainlist.append(dictversion)
print("Appended in both section and class",mainlist)
if classSelected==True and sectionSelected==False:
if int(classdata)==int(formclass) :
mainlist.append(dictversion)
print("Class true section false")
if classSelected==False and sectionSelected==True:
sectionwithoutclass=True
if classSelected==False and sectionSelected==False:
mainlist.append(dictversion)
print("Class false section false")
#if (sectionSelected==False and classSelected== False) and houseselected==False:
# mainlist.append(dictversion)
# print("All false")
print("\n^^^^^^MAIN LIST^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^",mainlist)
if houseselected==True:
for element in mainlist:
print("Element=",element)
print("Final list before if is",finalreportlist)
#print("form data is",formhouse)
#print("dict data is",element['House'])
if element['House'] ==formhouse:
finalreportlist.append(element)
print("\nFinal list after if is",finalreportlist)
else:
print("eneterd else")
finalreportlist=mainlist
```
【问题讨论】：
标签： python postgresql flask heroku sqlalchemy