我正在尝试编写代码来webscrap一些数字。如果我尝试在窗户上打印，我会把一切都搞好。打印效果很好。
但是在我添加代码以将数据保存到数据库（postgres）后，我得到了这个错误：“ValueError：int（（）的无效文字，基数为10：''”
Models.py：
from django.db import models
class Category(models.Model):
name = models.CharField(max_length=128, unique=False)
def __unicode__(self):
return '%s' %(self.name)
class Page(models.Model):
category = models.ForeignKey(Category)
title = models.CharField(max_length=128)
price = models.DecimalField(decimal_places=3, max_digits=8)
ann_hea = models.CharField(max_length=128, default='ann_headlines')
ann_date = models.CharField(max_length=128, default ='ann_date')
ann_det = models.CharField(max_length=128,default = 'ann_details')
ann_ty = models.CharField(max_length=128, default='ann_type')
multi = models.IntegerField(default=0)
ex_da = models.CharField(max_length=128, default='date')
def __unicode__(self):
return self.title
=========================================
“views.py”
from django.shortcuts import render
from django.http import HttpResponse
from django.template import RequestContext
from django.shortcuts import render_to_response
from django.shortcuts import render
from rango.models import Category
from rango.models import Page
from rango.forms import CategoryForm
'''
Code for form here.......
'''
'''
getFeedContentCA(web):
code to scrape web .. posting the last half for the code..
.
.
.
.
.
xyz = {'Title': x['Company Name'],'price': (x['Price']),'headlines':an_headlines,'Details':an_det,'type': an_ty,'multi': an_multi,'ex_da':an_ex_da,'date':an_date}
return xyz
y = getFeedContentCA('https://finance.yahoo.com/')
print (' _________________________________________ ')
print (y['Title'])
print (y['price'])
print (y['hea'])
print (y['Det'])
print (y['ty'])
print (y['multi'])
print (y['ex_da'])
print (y['date'])
a = Category.objects.create(name=x['Name'])
b = Page.objects.create(title=a, price=float(y['price']) ,ann_date=(y['date']), ann_hea=(y['hea']),ann_det=(y['Det']),ann_ty=(y['ty']),ex_da=(y['ex_da']), multi=(y['multi']))
b.save()
====================================
打印输出正常显示在窗口上，但是当我添加代码以将数据保存到数据库时，它会抛出该错误。我尝试在保存到数据库行的数据中添加'float'数据类型，但它没有帮助。
此处类似的错误给出了相同的添加解决方案： 1.浮点数据类型 2. Models.py中的十进制类型。
试过两个。
提前致谢！
添加跟踪错误：
Unhandled exception in thread started by <function check_errors.<locals>.wrapper at 0x0000000004A7C8C8>
Traceback (most recent call last):
File "C:\Python34\lib\site-packages\django\utils\autoreload.py", line 226, in wrapper
fn(*args, **kwargs)
File "C:\Python34\lib\site-packages\django\core\management\commands\runserver.py", line 121, in inner_run
self.check(display_num_errors=True)
File "C:\Python34\lib\site-packages\django\core\management\base.py", line 374, in check
include_deployment_checks=include_deployment_checks,
File "C:\Python34\lib\site-packages\django\core\management\base.py", line 361, in _run_checks
return checks.run_checks(**kwargs)
File "C:\Python34\lib\site-packages\django\core\checks\registry.py", line 81, in run_checks
new_errors = check(app_configs=app_configs)
File "C:\Python34\lib\site-packages\django\core\checks\urls.py", line 14, in check_url_config
return check_resolver(resolver)
File "C:\Python34\lib\site-packages\django\core\checks\urls.py", line 24, in check_resolver
for pattern in resolver.url_patterns:
File "C:\Python34\lib\site-packages\django\utils\functional.py", line 35, in __get__
res = instance.__dict__[self.name] = self.func(instance)
File "C:\Python34\lib\site-packages\django\urls\resolvers.py", line 313, in url_patterns
patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
File "C:\Python34\lib\site-packages\django\utils\functional.py", line 35, in __get__
res = instance.__dict__[self.name] = self.func(instance)
File "C:\Python34\lib\site-packages\django\urls\resolvers.py", line 306, in urlconf_module
return import_module(self.urlconf_name)
File "C:\Python34\lib\importlib\__init__.py", line 109, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 2254, in _gcd_import
File "<frozen importlib._bootstrap>", line 2237, in _find_and_load
File "<frozen importlib._bootstrap>", line 2226, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 1200, in _load_unlocked
File "<frozen importlib._bootstrap>", line 1129, in _exec
File "<frozen importlib._bootstrap>", line 1471, in exec_module
File "<frozen importlib._bootstrap>", line 321, in _call_with_frames_removed
File "C:\Python34\test\lepnew\urls.py", line 23, in <module>
url(r'^rango/', include('rango.urls'))
File "C:\Python34\lib\site-packages\django\conf\urls\__init__.py", line 50, in include
urlconf_module = import_module(urlconf_module)
File "C:\Python34\lib\importlib\__init__.py", line 109, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 2254, in _gcd_import
File "<frozen importlib._bootstrap>", line 2237, in _find_and_load
File "<frozen importlib._bootstrap>", line 2226, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 1200, in _load_unlocked
File "<frozen importlib._bootstrap>", line 1129, in _exec
File "<frozen importlib._bootstrap>", line 1471, in exec_module
File "<frozen importlib._bootstrap>", line 321, in _call_with_frames_removed
File "C:\Python34\test\rango\urls.py", line 18, in <module>
from rango import views
File "C:\Python34\test\rango\views.py", line 280, in <module>
b = Page.objects.create(title=a, price=float(y['price']) ,ann_date=(y['ex_date']), ann_headlines=(y['headlines']),ann_details=(y['Details']),ann_type=(y['type']),ex_date=(y['ex_date']), multiplier=(y['multiplier']))
File "C:\Python34\lib\site-packages\django\db\models\manager.py", line 85, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "C:\Python34\lib\site-packages\django\db\models\query.py", line 399, in create
obj.save(force_insert=True, using=self.db)
File "C:\Python34\lib\site-packages\django\db\models\base.py", line 796, in save
force_update=force_update, update_fields=update_fields)
File "C:\Python34\lib\site-packages\django\db\models\base.py", line 824, in save_base
updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)
File "C:\Python34\lib\site-packages\django\db\models\base.py", line 908, in _save_table
result = self._do_insert(cls._base_manager, using, fields, update_pk, raw)
File "C:\Python34\lib\site-packages\django\db\models\base.py", line 947, in _do_insert
using=using, raw=raw)
File "C:\Python34\lib\site-packages\django\db\models\manager.py", line 85, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "C:\Python34\lib\site-packages\django\db\models\query.py", line 1045, in _insert
return query.get_compiler(using=using).execute_sql(return_id)
File "C:\Python34\lib\site-packages\django\db\models\sql\compiler.py", line 1053, in execute_sql
for sql, params in self.as_sql():
File "C:\Python34\lib\site-packages\django\db\models\sql\compiler.py", line 1006, in as_sql
for obj in self.query.objs
File "C:\Python34\lib\site-packages\django\db\models\sql\compiler.py", line 1006, in <listcomp>
for obj in self.query.objs
File "C:\Python34\lib\site-packages\django\db\models\sql\compiler.py", line 1005, in <listcomp>
[self.prepare_value(field, self.pre_save_val(field, obj)) for field in fields]
File "C:\Python34\lib\site-packages\django\db\models\sql\compiler.py", line 945, in prepare_value
value = field.get_db_prep_save(value, connection=self.connection)
File "C:\Python34\lib\site-packages\django\db\models\fields\__init__.py", line 755, in get_db_prep_save
prepared=False)
File "C:\Python34\lib\site-packages\django\db\models\fields\__init__.py", line 747, in get_db_prep_value
value = self.get_prep_value(value)
File "C:\Python34\lib\site-packages\django\db\models\fields\__init__.py", line 1832, in get_prep_value
return int(value)
ValueError: invalid literal for int() with base 10: ' '
答案 0 :(得分：0)
DecimalField需要一个字符串。您可能希望切换到FloatField并添加帮助函数以获取格式化价格。