Python 问题编号:, “客户端id”:客户端计数器, “date”:fake.date\u time\u此\u十年(在\u now=True之前,在\u now=False之后,tzinfo=None) }) 对于范围内的文章计数器(0,每期文章数): 附加条款({ “id”:(每期文章数量*发行id)+文章计数器, “问题id”:问题id, 'title':'{}-{}'。格式(client_title,fake.catch_phrase()), 'body':'{}-{}'。格式(client_title,fake.text(max_nb_chars=200)) }) db.session.bulk\u insert\u映射(客户端,客户端) db.session.bulk\u insert\u映射(问题,问题) db.session.bulk\u insert\u映射(文章,文章) db.session.commit() 如果uuuu name uuuuuu='\uuuuuuu main\uuuuuuu': 构建示例数据库() app.run(debug=True)
下面是一个使用SQLite的单个文件示例: 主要是简单的烧瓶,SQLalchemy和烧瓶管理员。感兴趣的类别是Python 问题编号:, “客户端id”:客户端计数器, “date”:fake.date\u time\u此\u十年(在\u now=True之前,在\u now=False之后,tzinfo=None) }) 对于范围内的文章计数器(0,每期文章数): 附加条款({ “id”:(每期文章数量*发行id)+文章计数器, “问题id”:问题id, 'title':'{}-{}'。格式(client_title,fake.catch_phrase()), 'body':'{}-{}'。格式(client_title,fake.text(max_nb_chars=200)) }) db.session.bulk\u insert\u映射(客户端,客户端) db.session.bulk\u insert\u映射(问题,问题) db.session.bulk\u insert\u映射(文章,文章) db.session.commit() 如果uuuu name uuuuuu='\uuuuuuu main\uuuuuuu': 构建示例数据库() app.run(debug=True),python,flask,sqlalchemy,flask-admin,Python,Flask,Sqlalchemy,Flask Admin,下面是一个使用SQLite的单个文件示例: 主要是简单的烧瓶,SQLalchemy和烧瓶管理员。感兴趣的类别是FilterByClientTitle class FilterByClientTitle(BaseSQLAFilter): # Override to create an appropriate query and apply a filter to said query with the passed value from the filter UI def app
FilterByClientTitle
class FilterByClientTitle(BaseSQLAFilter):
# Override to create an appropriate query and apply a filter to said query with the passed value from the filter UI
def apply(self, query, value, alias=None):
return query.join(Article.issue).join(Issue.client).filter(Client.title == value)
# readable operation name. This appears in the middle filter line drop-down
def operation(self):
return u'equals'
# Override to provide the options for the filter - in this case it's a list of the titles of the Client model
def get_options(self, view):
return [(client.title, client.title) for client in Client.query.order_by(Client.title)]
文章模型的视图有两个重要的设置/覆盖:
class ArticleView(BaseAdminView):
# ......
# No need to specify the column as we'll set the SQLalchemy filter directly in the filter's apply method
column_filters = [FilterByClientTitle(column=None, name='Client Title')]
# Need this so the filter options are always up-to-date
@expose('/')
def index_view(self):
self._refresh_filters_cache()
return super(ArticleView, self).index_view()
以下是完整的示例,需要随机数据库:
import datetime
from flask import Flask, url_for
from flask_admin.contrib.sqla import ModelView
from flask_sqlalchemy import SQLAlchemy
from flask_admin import Admin, expose
from faker import Faker
from flask_admin.contrib.sqla.filters import BaseSQLAFilter
from markupsafe import Markup
app = Flask(__name__)
# Create dummy secrey key so we can use sessions
app.config['SECRET_KEY'] = '123456790'
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///sample_db.sqlite'
db = SQLAlchemy(app)
@app.route('/')
def index():
return '<a href="/admin/">Click me to get to Admin!</a>'
class Client(db.Model):
__tablename__ = 'clients'
id = db.Column(db.Integer(), primary_key=True)
title = db.Column(db.String(1000))
def __str__(self):
return unicode(self).encode('utf-8')
def __unicode__(self):
return self.title
class Issue(db.Model):
__tablename__ = 'issues'
id = db.Column(db.Integer(), primary_key=True)
date = db.Column(db.Date, default=datetime.date.today())
client_id = db.Column(db.Integer(), db.ForeignKey('clients.id'), nullable=False)
client = db.relationship(Client, backref=db.backref('issues', uselist=True, cascade='all, delete-orphan'))
def __str__(self):
return unicode(self).encode('utf-8')
def __unicode__(self):
return unicode(self.date)
class Article(db.Model):
__tablename__ = 'articles'
id = db.Column(db.Integer(), primary_key=True)
title = db.Column(db.String())
body = db.Column(db.String())
issue_id = db.Column(db.Integer(), db.ForeignKey('issues.id'), nullable=False)
issue = db.relationship(Issue, backref=db.backref('articles', uselist=True, cascade='all, delete-orphan'))
def __str__(self):
return unicode(self).encode('utf-8')
def __unicode__(self):
return '{title} ... {body} ...'.format(title=self.title[:30], body=self.body[:30])
class BaseAdminView(ModelView):
can_view_details = True
named_filter_urls = True
class ClientView(BaseAdminView):
column_list = ('id', 'title')
column_default_sort = ('title', False)
column_filters = ['id', 'title']
class IssueView(BaseAdminView):
column_list = ('id', 'date', 'articles')
column_default_sort = ('date', False)
column_filters = ['id', 'date']
column_formatters = {
'articles': lambda v, c, m, n: Markup('<br>'.join([unicode(a) for a in m.articles])),
}
class FilterByClientTitle(BaseSQLAFilter):
# Override to create an appropriate query and apply a filter to said query with the passed value from the filter UI
def apply(self, query, value, alias=None):
return query.join(Article.issue).join(Issue.client).filter(Client.title == value)
# readable operation name. This appears in the middle filter line drop-down
def operation(self):
return u'equals'
# Override to provide the options for the filter - in this case it's a list of the titles of the Client model
def get_options(self, view):
return [(client.title, client.title) for client in Client.query.order_by(Client.title)]
class ArticleView(BaseAdminView):
column_list = ('title', 'body', 'issue', 'issue.client')
column_labels = {
'issue': 'Issue Date',
'issue.client': 'Client Title'
}
column_default_sort = ('title', False)
def issue_link(self, context, model, name):
return Markup('<a href="{url}" title="Link to Issue">{date}</a>'.format(
url=url_for('issue.index_view', flt1_id_equals=model.issue.id),
date=model.issue.date)
)
def client_link(self, context, model, name):
return Markup('<a href="{url}" title="Link to Client">{title}</a>'.format(
url=url_for('client.index_view', flt1_id_equals=model.issue.client.id),
title=model.issue.client.title)
)
# Display Issue Date and Client Title as links back to their filtered views
column_formatters = {
'title': lambda v, c, m, n: '{} ...'.format(m.title[:20]),
'body': lambda v, c, m, n: '{} ...'.format(m.body[:40]),
'issue': issue_link,
'issue.client': client_link,
}
# No need to specify the column as we'll set the SQLalchemy filter directly in the filter's apply method
column_filters = [FilterByClientTitle(column=None, name='Client Title')]
# Need this so the filter options are always up-to-date
@expose('/')
def index_view(self):
self._refresh_filters_cache()
return super(ArticleView, self).index_view()
admin = Admin(app, template_mode="bootstrap3")
admin.add_view(ClientView(Client, db.session))
admin.add_view(IssueView(Issue, db.session))
admin.add_view(ArticleView(Article, db.session))
def build_sample_db():
fake = Faker()
number_of_clients = 100
number_of_issues_per_client = 5
number_of_articles_per_issues = 5
db.drop_all()
db.create_all()
clients = []
issues = []
articles = []
for client_counter in range(0, number_of_clients):
client_title = fake.last_name()
clients.append({
'id': client_counter,
'title': client_title
})
for issue_counter in range(0, number_of_issues_per_client):
issue_id = number_of_issues_per_client * client_counter + issue_counter
issues.append({
'id': issue_id,
'client_id': client_counter,
'date': fake.date_time_this_decade(before_now=True, after_now=False, tzinfo=None)
})
for article_counter in range(0, number_of_articles_per_issues):
articles.append({
'id': (number_of_articles_per_issues * issue_id) + article_counter,
'issue_id': issue_id,
'title': '{} - {}'.format(client_title, fake.catch_phrase()),
'body': '{} - {}'.format(client_title, fake.text(max_nb_chars=200))
})
db.session.bulk_insert_mappings(Client, clients)
db.session.bulk_insert_mappings(Issue, issues)
db.session.bulk_insert_mappings(Article, articles)
db.session.commit()
if __name__ == '__main__':
build_sample_db()
app.run(debug=True)
导入日期时间
从烧瓶导入烧瓶,url_
从flask_admin.contrib.sqla导入模型视图
从flask_sqlalchemy导入sqlalchemy
从flask_admin导入admin,公开
从冒牌货进口冒牌货
从flask_admin.contrib.sqla.filters导入BaseSQLAFilter
从markupsafe导入标记
app=烧瓶(名称)
#创建虚拟secrey密钥以便我们可以使用会话
app.config['SECRET_KEY']='123456790'
app.config['SQLALCHEMY\u DATABASE\u URI']='sqlite:///sample_db.sqlite'
db=SQLAlchemy(应用程序)
@应用程序路径(“/”)
def index():
返回“”
类客户端(db.Model):
__tablename_uu='客户端'
id=db.Column(db.Integer(),主键=True)
title=db.Column(db.String(1000))
定义(自我):
返回unicode(self).encode('utf-8')
def ___; unicode(自):
返回自己的标题
类别问题(数据库模型):
__tablename_uuu='issues'
id=db.Column(db.Integer(),主键=True)
date=db.Column(db.date,默认为datetime.date.today())
client_id=db.Column(db.Integer(),db.ForeignKey('clients.id'),nullable=False)
client=db.relationship(client,backref=db.backref('issues',uselist=True,cascade='all,delete orphan'))
定义(自我):
返回unicode(self).encode('utf-8')
def ___; unicode(自):
返回unicode(self.date)
类别文章(db.Model):
__tablename_uu='articles'
id=db.Column(db.Integer(),主键=True)
title=db.Column(db.String())
body=db.Column(db.String())
issue_id=db.Column(db.Integer(),db.ForeignKey('issues.id'),nullable=False)
issue=db.relationship(issue,backref=db.backref('articles',uselist=True,cascade='all,delete orphan'))
定义(自我):
返回unicode(self).encode('utf-8')
def ___; unicode(自):
返回“{title}…”。。。{body}…'.format(title=self.title[:30],body=self.body[:30])
类BaseAdminView(模型视图):
can\u view\u details=True
命名的\u过滤器\u URL=True
类ClientView(BaseAdminView):
列列表=('id','title')
列\默认\排序=('title',False)
列过滤器=['id','title']
类发布视图(BaseAdminView):
列列表=('id','date','articles')
列\默认\排序=('date',False)
列过滤器=['id','date']
列\u格式化程序={
“articles”:lambda v,c,m,n:Markup(“
”.join([unicode(a)表示m.articles中的a]),
}
类FilterByClientTitle(BaseSQLAFilter):
#重写以创建适当的查询,并使用筛选器UI传递的值对所述查询应用筛选器
def apply(自我、查询、值、别名=无):
返回query.join(Article.issue).join(issue.client).filter(client.title==value)
#可读操作名。出现在中间的过滤线下拉
def操作(自):
返回“相等”
#覆盖以提供过滤器的选项-在本例中,它是客户机模型标题的列表
def get_选项(自身、视图):
返回client.query.order\u by(client.title)中客户的[(client.title,client.title)]
类ArticleView(BaseAdminView):
列列表=('title','body','issue','issue.client')
列_标签={
“发行”:发行日期,
“问题.客户”:“客户标题”
}
列\默认\排序=('title',False)
def问题链接(自身、上下文、模型、名称):
返回标记(“”.format(
url=url\u for('issue.index\u view',flt1\u id\u=model.issue.id),
日期=型号。问题。日期)
)
def客户端链接(自身、上下文、模型、名称):
返回标记(“”.format(
url=url\u for('client.index\u view',flt1\u id\u=model.issue.client.id),
title=model.issue.client.title)
)
#显示问题日期和客户标题作为链接返回到其筛选视图
列\u格式化程序={
“title”:lambda v,c,m,n:“{}…”。格式(m.title[:20]),
“body”:lambda v,c,m,n:“{}…”。格式(m.body[:40]),
“问题”:问题链接,
'issue.client':客户端链接,
}
#无需指定列,因为我们将直接在过滤器的apply方法中设置SQLalchemy过滤器
column_filters=[FilterByClientTitle(column=None,name='Client Title')]
#需要此选项,以便过滤器选项始终是最新的
@暴露(“/”)
def索引_视图(自):
self.\u刷新\u过滤器\u缓存()
返回super(ArticleView,self).index_view()
admin=admin(应用程序,模板=“bootstrap3”)
管理添加视图(客户端视图(客户端,数据库会话))
管理添加视图(发布视图(发布,数据库会话))
管理添加视图(ArticleView(Article,db.session))
def build_sample_db():
假
客户机数量=100
每个客户的问题数量=5
每期文章数量=5篇
db.drop_all()
db.create_all()
客户=[]
问题=[]
艺术
import datetime
from flask import Flask, url_for
from flask_admin.contrib.sqla import ModelView
from flask_sqlalchemy import SQLAlchemy
from flask_admin import Admin, expose
from faker import Faker
from flask_admin.contrib.sqla.filters import BaseSQLAFilter
from markupsafe import Markup
app = Flask(__name__)
# Create dummy secrey key so we can use sessions
app.config['SECRET_KEY'] = '123456790'
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///sample_db.sqlite'
db = SQLAlchemy(app)
@app.route('/')
def index():
return '<a href="/admin/">Click me to get to Admin!</a>'
class Client(db.Model):
__tablename__ = 'clients'
id = db.Column(db.Integer(), primary_key=True)
title = db.Column(db.String(1000))
def __str__(self):
return unicode(self).encode('utf-8')
def __unicode__(self):
return self.title
class Issue(db.Model):
__tablename__ = 'issues'
id = db.Column(db.Integer(), primary_key=True)
date = db.Column(db.Date, default=datetime.date.today())
client_id = db.Column(db.Integer(), db.ForeignKey('clients.id'), nullable=False)
client = db.relationship(Client, backref=db.backref('issues', uselist=True, cascade='all, delete-orphan'))
def __str__(self):
return unicode(self).encode('utf-8')
def __unicode__(self):
return unicode(self.date)
class Article(db.Model):
__tablename__ = 'articles'
id = db.Column(db.Integer(), primary_key=True)
title = db.Column(db.String())
body = db.Column(db.String())
issue_id = db.Column(db.Integer(), db.ForeignKey('issues.id'), nullable=False)
issue = db.relationship(Issue, backref=db.backref('articles', uselist=True, cascade='all, delete-orphan'))
def __str__(self):
return unicode(self).encode('utf-8')
def __unicode__(self):
return '{title} ... {body} ...'.format(title=self.title[:30], body=self.body[:30])
class BaseAdminView(ModelView):
can_view_details = True
named_filter_urls = True
class ClientView(BaseAdminView):
column_list = ('id', 'title')
column_default_sort = ('title', False)
column_filters = ['id', 'title']
class IssueView(BaseAdminView):
column_list = ('id', 'date', 'articles')
column_default_sort = ('date', False)
column_filters = ['id', 'date']
column_formatters = {
'articles': lambda v, c, m, n: Markup('<br>'.join([unicode(a) for a in m.articles])),
}
class FilterByClientTitle(BaseSQLAFilter):
# Override to create an appropriate query and apply a filter to said query with the passed value from the filter UI
def apply(self, query, value, alias=None):
return query.join(Article.issue).join(Issue.client).filter(Client.title == value)
# readable operation name. This appears in the middle filter line drop-down
def operation(self):
return u'equals'
# Override to provide the options for the filter - in this case it's a list of the titles of the Client model
def get_options(self, view):
return [(client.title, client.title) for client in Client.query.order_by(Client.title)]
class ArticleView(BaseAdminView):
column_list = ('title', 'body', 'issue', 'issue.client')
column_labels = {
'issue': 'Issue Date',
'issue.client': 'Client Title'
}
column_default_sort = ('title', False)
def issue_link(self, context, model, name):
return Markup('<a href="{url}" title="Link to Issue">{date}</a>'.format(
url=url_for('issue.index_view', flt1_id_equals=model.issue.id),
date=model.issue.date)
)
def client_link(self, context, model, name):
return Markup('<a href="{url}" title="Link to Client">{title}</a>'.format(
url=url_for('client.index_view', flt1_id_equals=model.issue.client.id),
title=model.issue.client.title)
)
# Display Issue Date and Client Title as links back to their filtered views
column_formatters = {
'title': lambda v, c, m, n: '{} ...'.format(m.title[:20]),
'body': lambda v, c, m, n: '{} ...'.format(m.body[:40]),
'issue': issue_link,
'issue.client': client_link,
}
# No need to specify the column as we'll set the SQLalchemy filter directly in the filter's apply method
column_filters = [FilterByClientTitle(column=None, name='Client Title')]
# Need this so the filter options are always up-to-date
@expose('/')
def index_view(self):
self._refresh_filters_cache()
return super(ArticleView, self).index_view()
admin = Admin(app, template_mode="bootstrap3")
admin.add_view(ClientView(Client, db.session))
admin.add_view(IssueView(Issue, db.session))
admin.add_view(ArticleView(Article, db.session))
def build_sample_db():
fake = Faker()
number_of_clients = 100
number_of_issues_per_client = 5
number_of_articles_per_issues = 5
db.drop_all()
db.create_all()
clients = []
issues = []
articles = []
for client_counter in range(0, number_of_clients):
client_title = fake.last_name()
clients.append({
'id': client_counter,
'title': client_title
})
for issue_counter in range(0, number_of_issues_per_client):
issue_id = number_of_issues_per_client * client_counter + issue_counter
issues.append({
'id': issue_id,
'client_id': client_counter,
'date': fake.date_time_this_decade(before_now=True, after_now=False, tzinfo=None)
})
for article_counter in range(0, number_of_articles_per_issues):
articles.append({
'id': (number_of_articles_per_issues * issue_id) + article_counter,
'issue_id': issue_id,
'title': '{} - {}'.format(client_title, fake.catch_phrase()),
'body': '{} - {}'.format(client_title, fake.text(max_nb_chars=200))
})
db.session.bulk_insert_mappings(Client, clients)
db.session.bulk_insert_mappings(Issue, issues)
db.session.bulk_insert_mappings(Article, articles)
db.session.commit()
if __name__ == '__main__':
build_sample_db()
app.run(debug=True)