代码跳过IF语句，直接转到ELSE语句
代码跳过IF语句，直接转到ELSE语句
提问于 2018-05-07 23:30:37
//如果语句被完全跳过，但当我删除ELSE语句时，IF语句可以工作吗？
if fname != '' and lname != '' and user != '' and rank != '' and password !=
'' and firenum != '' and phonenum != '' and phoneconfirm != '' and admin !=
'':
if phonenum == phoneconfirm and len(phonenum) == int(10):
get = AllPersonnel.query.filter_by(agencyid=current_user.agencyid).all()
for i in get:
if phonenum == i.phonenum:
all = []
all.append({'error' : 'ERROR: Phone number already exists in database'})
return jsonify(all)
else:
pers = AllPersonnel(name.upper(), rank.upper(), firenum, phonenum, username, password, admin.upper(), agencyid, agencyname.upper(), availability, avtimestamp, enat, enattimestamp, taskavailbility, avtimetsamptask, plusdate)
db.session.add(pers)
db.session.commit()
all = []
all.append({'success' : 'SUCCESS: FireFighter added to database!'})
return jsonify(all)这是我的另一个代码，适用于我的另一个程序。
phoneemp = EmsaEmp.query.all()
for num in phoneemp:
if phonenum == num.phonenum:
allexist = ('ERROR: Phone Number Already Exists In Database. Please Use The Help Desk or Contact a Supervisor. Thanks')
return render_template('register.html', allexist=allexist)
else:
print('Success')
ans = ''
name = (fname + ' ' + lname)
emp = EmsaEmp(name.upper(), title.upper(), phonenum, ans)
db.session.add(emp)
db.session.commit()这就是我最终要做的，现在它起作用了。
if phonenum == phoneconfirm and len(phonenum) == int(10):
get = AllPersonnel.query.filter_by(agencyid=current_user.agencyid).all()
for i in get:
if phonenum == i.phonenum:
all = []
all.append({'error' : 'ERROR: Phone number already exists in database'})
return jsonify(all)
for u in get:
if phonenum != i.phonenum:
pers = AllPersonnel(name.upper(), rank.upper(), firenum, phonenum, username, password, admin.upper(), agencyid, agencyname.upper(), availability, avtimestamp, enat, enattimestamp, taskavailbility, avtimetsamptask, plusdate)
db.session.add(pers)
db.session.commit()
all = []
all.append({'success' : 'SUCCESS: FireFighter added to database!'})
return jsonify(all)回答 1
Stack Overflow用户
发布于 2018-05-07 23:33:44
你在一个循环中。
因此，在第一个元素上，您将获得else，然后是return，并且永远不会执行后续的元素。
如果您删除else，那么您的algo将有机会执行后续的if语句。
我会说你的算法没有做你想做的事情;-)。
此外，将您庞大的if替换为
if all((fname, lname, user, rank, password, firenum, phonenum, phoneconfirm, admin)):更多信息请点击此处：https://docs.python.org/3.6/library/functions.html#all
而且不需要做len(phonenum) == int(10)。只要len(phonenum) == 10就足够了(Python至少和其他语言一样简单，如果不是更简单的话)
另一个问题：
all = []
all.append({'error' : 'ERROR: Phone number already exists in database'})
return jsonify(all)可以将其重写为：
return jsonify([{'error' : 'ERROR: Phone number already exists in database'}])这样您就不再需要创建临时变量(这不是这3行代码的唯一问题，但我就到此为止)。
大编辑：
请尝试以下代码：
import collections
PersonnelData = collections.namedtuple('PersonnelData', [
'fname', 'lname', 'user', 'rank', 'password',
'firenum', 'phonenum', 'phoneconfirm', 'admin',
])
@app.route('/addpersonnellist', methods=['GET', 'POST'])
def addpersonnellist():
data = PersonnelData(
fname=request.args.get('fname'),
lname=request.args.get('lname'),
username=request.args.get('user'),
rank=request.args.get('rank'),
password=request.args.get('password'),
firenum=request.args.get('firenumone'),
phonenum=request.args.get('phonenum'),
phoneconfirm=request.args.get('phonenumconfirm'),
admin=request.args.get('admin'),
)
name = '{data.fname} {data.lname}'.format(data=data)
if all(data):
if phonenum == phoneconfirm and len(phonenum) == 10:
personnel_phonenum = AllPersonnel.objects.values_list('phonenum', flat=True)
if data.phonenum in personnel_phonenum:
response = 'ERROR: Phone number already exists in database'
else:
pers = AllPersonnel(
name.upper(), data.rank.upper(), data.firenum, data.phonenum,
data.username, data.password, data.admin.upper(),
current_user.agencyid, current_user.agencyname.upper(),
'', '', '', '', '', '', '',
)
db.session.add(pers)
db.session.commit() # Can you do a commit when you're not in a transaction???
response = 'SUCCESS: FireFighter added to database!'
else:
response = 'ERROR: Phone numbers do not match and/or format is invalid.'
else:
response = 'ERROR: Not all fields filled out correctly!'
return jsonify({'response' : response})正如您所注意到的，这里没有for循环。尝试使用实际的API。花点时间阅读文档。这不是浪费时间。
检查这个：https://docs.djangoproject.com/en/1.11/ref/models/querysets/#values-list
单一保护方式的另一种替代方法是使用return子句：https://refactoring.com/catalog/replaceNestedConditionalWithGuardClauses.html
import collections
PersonnelData = collections.namedtuple('PersonnelData', [
'fname', 'lname', 'user', 'rank', 'password',
'firenum', 'phonenum', 'phoneconfirm', 'admin',
])
@app.route('/addpersonnellist', methods=['GET', 'POST'])
def addpersonnellist():
data = PersonnelData(
fname=request.args.get('fname'),
lname=request.args.get('lname'),
username=request.args.get('user'),
rank=request.args.get('rank'),
password=request.args.get('password'),
firenum=request.args.get('firenumone'),
phonenum=request.args.get('phonenum'),
phoneconfirm=request.args.get('phonenumconfirm'),
admin=request.args.get('admin'),
)
if not all(data):
return jsonify({'response' : 'ERROR: Not all fields filled out correctly!'})
if not phonenum == phoneconfirm or len(phonenum) != 10:
return jsonify({'response' : 'ERROR: Phone numbers do not match and/or format is invalid.'})
personnel_phonenum = AllPersonnel.objects.values_list('phonenum', flat=True)
if data.phonenum in personnel_phonenum:
return jsonify({'response' : 'ERROR: Phone number already exists in database'})
pers = AllPersonnel(
'{data.fname} {data.lname}'.format(data=data).upper(),
data.rank.upper(), data.firenum, data.phonenum,
data.username, data.password, data.admin.upper(),
current_user.agencyid, current_user.agencyname.upper(),
'', '', '', '', '', '', '',
)
db.session.add(pers)
db.session.commit() # Can you do a commit when you're not in a transaction???
return jsonify({'response' : 'SUCCESS: FireFighter added to database!'})页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/50217722
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