我在尝试将我的SCSS文件编译成CSS时遇到错误.错误内容为:"选择器组可能无法扩展"以引用此行@extend .btn, .btn-link;.
注意:我正在导入Bootstrap以在我的主scss文件中使用.
完整片段:
button {
@extend .btn, .btn-link;
background-color: $lf-green;
color: #fff;
font-size: 10px;
padding: 2px 5px;
text-transform: uppercase;
&:hover {
background: rgba(5,97,43,0.9);
color: #fff;
text-decoration: none;
}
}
我究竟做错了什么？
谢谢!
更新:
后代:我无法做到这一点的原因是因为我通过node-sass使用lib-sass,它不与通过传统方式https://github.com/andrew/node提供的当前sass版本相匹配-sass#reporting-sass-compilation-and-syntax-issues.
我有一个名为Event的Django模型,它具有事件日期的日期字段:
class Event(models.Model):
event_date = models.DateField()
我希望能够在模型上设置一个方法来判断事件是"春季学期"事件还是"秋季学期"事件.
春季学期定义为1月至5月.秋天是八月到十二月.
我的目标是能够在一年的一般事件列表中按学期过滤.
我将如何编写定义每个学期的方法？
我想使用他们在此处描述的技术从 Flask 流式传输 CSV ：
from flask import Response
@app.route('/large.csv')
def generate_large_csv():
def generate():
for row in iter_all_rows():
yield ','.join(row) + '\n'
return Response(generate(), mimetype='text/csv')
我有一个来自 sqlalchemy 的查询，它返回一个 Purchase 对象列表。我想将其写入 CSV，理想情况下可以自定义输出到文件的属性。
不幸的是，我目前得到一个空白的 CSV 作为输出：
@app.route('/sales_export.csv')
@login_required
def sales_export():
""" Export a CSV of all sales data """
def generate():
count = 0
fieldnames = [
'uuid',
'recipient_name',
'recipient_email',
'shipping_street_address_1',
'shipping_street_address_2',
'shipping_city',
'shipping_state',
'shipping_zip',
'purchaser_name',
'purchaser_email',
'personal_message',
'sold_at'
]
for i, row in enumerate(Purchase.query.all()):
if i == 0:
yield …我有两个出版物和员工模型:
class Publication(models.Model):
BOOK_CHAPTER = 1
ARTICLE = 2
PUBLICATION_CHOICES = (
(BOOK_CHAPTER, 'Book chapter'),
(ARTICLE, 'Article'),
)
publication_type = models.IntegerField(choices=PUBLICATION_CHOICES)
article_title = models.CharField(max_length=250, help_text='Limited to 250 characters. May also be used for book chapter titles.')
slug = models.SlugField(help_text='Suggested value automatically generated from title.')
primary_author = models.ForeignKey('Employee', limit_choices_to={'employee_type': 1}, help_text='Most of the time, this will be the faculty member to whom the publication is tied.')
authors = models.CharField(max_length=250, help_text='Limited to 250 characters. Please adhere to accepted format for style. Include …尝试使用JSON写入CSV时出现以下错误:
Traceback (most recent call last):
File "twitter_search_csv.py", line 25, in <module>
status['retweet_count'],
UnicodeEncodeError: 'ascii' codec can't encode character u'\u2026' in position 139: ordinal not in range(128)
这是我正在使用的代码:
import requests
import urllib2
from requests_oauthlib import OAuth1
import csv
auth = OAuth1('', '', '', '')
url = 'https://api.twitter.com/1.1/search/tweets.json?q=%23OpeningCeremony'
response = requests.get(url, auth=auth)
data = response.json()['statuses']
with open('olympic_search.csv', 'wb') as csvfile:
f = csv.writer(csvfile)
for status in data:
f.writerow([
status['id'],
status['text'],
status['created_at'],
status['coordinates'],
status['user']['id_str'],
status['retweet_count'],
])
如果上传的文件包含不在硬编码列表中的扩展名,我有一个基本的模型字段验证器来引发ValidationError.
模型表单仅从管理角度使用.但是在我的测试中,尽管给出了无效的文件扩展名,但我无法获得异常.我究竟做错了什么？
验证者:
import os
from django.core.exceptions import ValidationError
def validate_file_type(value):
accepted_extensions = ['.png', '.jpg', '.jpeg', '.pdf']
extension = os.path.splitext(value.name)[1]
if extension not in accepted_extensions:
raise ValidationError(u'{} is not an accepted file type'.format(value))
型号:
from agency.utils.validators import validate_file_type
from django.db import models
from sorl.thumbnail import ImageField
class Client(models.Model):
"""
A past or current client of the agency.
"""
logo = ImageField(
help_text='Please use jpg (jpeg) or png files only. Will be resized \
for public display.',
upload_to='clients/logos',
default='', …我需要一个允许员工用户查看草稿状态对象的视图.但我发现很难为这个观点编写单元测试.
我正在使用Factory Boy进行设置:
class UserFactory(factory.django.DjangoModelFactory):
class Meta:
model = User
username = factory.LazyAttribute(lambda t: random_string())
password = factory.PostGenerationMethodCall('set_password', 'mysecret')
email = fuzzy.FuzzyText(
length=12, suffix='@email.com').fuzz().lower()
is_staff = True
is_active = True
class ReleaseFactory(factory.django.DjangoModelFactory):
class Meta:
model = Release
headline = factory.LazyAttribute(lambda t: random_string())
slug = factory.LazyAttribute(lambda t: slugify(t.headline))
author = factory.LazyAttribute(lambda t: random_string())
excerpt = factory.LazyAttribute(lambda t: random_string())
body = factory.LazyAttribute(lambda t: random_string())
class TestReleaseViews(TestCase):
"""
Ensure our view returns a list of :model:`news.Release` objects.
"""
def setUp(self):
self.client = Client() …我想在点击img元素时切换"active"类.但是当点击具有"活动"类的元素时,我希望将其删除.
这是我目前正在使用的JS:
$('.employee_mugshot').click(function() {
$(".employee_mugshot").removeClass("active");
$(this).addClass('active');
});
这是我在JSFiddle中的完整示例:http://jsfiddle.net/patrickbeeson/6ec2K/