I failed to find back reference object for related items.
my code:
back_rels = list(catalog.findRelations({'to_id': intids.getId(aq_base(self.context))}))
for rel in back_rels:
ob = portal.unrestrictedTraverse(rel.from_path)
It throws exception when running at ob = portal.unrestrictedTraverse(rel.from_path).
Debug results:
> len(back_rels)
> 1
> rel
> <z3c.relationfield.relation.RelationValue object at oxoA86f8f0>
> rel.from_path
> 'new-grants-target-bioterrorism'
> rel.to_path
> '/portal/urnews/ur-gets-20-million-for-biodefense-studies'
I guess the problem is the rel.from_path doesn't return the full path like the rel.to_path does.
My question is how can rel.from_path return with full path and get right object at
portal.unrestrictedTraverse(rel.from_path)?
I am running Plone 4 and use dexterity content type.
Unfortunately you can't access from_object directy. It is explained in this issue http://code.google.com/p/dexterity/issues/detail?id=95
Use from_id, which stores IntId and use IntIds utility to retrieve the particular object:
from Acquisition import aq_inner
from zope.component import getUtility
from zope.intid.interfaces import IIntIds
from zope.security import checkPermission
from zc.relation.interfaces import ICatalog
def back_references(source_object, attribute_name):
""" Return back references from source object on specified attribute_name """
catalog = getUtility(ICatalog)
intids = getUtility(IIntIds)
result = []
for rel in catalog.findRelations(
dict(to_id=intids.getId(aq_inner(source_object)),
from_attribute=attribute_name)
):
obj = intids.queryObject(rel.from_id)
if obj is not None and checkPermission('zope2.View', obj):
result.append(obj)
return result
Related
I have two models Article and Tag. Article has a foreign key from Tag
class Tag(MyAbstractBaseModel):
name = fields.CharField(max_length=255, index=True)
class Article(MyAbstractBaseModel):
title = fields.CharField(max_length=255, index=True)
body = fields.CharField(max_length=255)
tag = fields.ForeignKeyField(model_name="Tag", related_name='article', on_delete=fields.CASCADE)
Here I would like to have my response checked by the following
#router.get("/article", response_model=get_serialize_pydantic(Article))
async def get():
pass
Here is how I get the response model
from tortoise.contrib.pydantic import pydantic_model_creator
from pydantic import BaseModel, Field, create_model
def get_serialize_pydantic(models_obj: Type[Model], exclude: Tuple[str, ...] = None):
my_model_pydantic = pydantic_model_creator(models_obj)
response_pydantic = create_model(
__model_name=f"{models_obj.__name__}_response_pydantic",
data=(Optional[List[my_model_pydantic]], Field(None, title="data")),
__base__=BaseResponse)
return response_pydantic
Problem is I only title and body in my response model, there is no tag in it. Anyone knows why?
This is not an issue from pydantic side. It's pydantic_model_creator of tortoise that causes the problem.
The solution is simple. Just init before serialisation.
from tortoise import Tortoise
Tortoise.init_models(["__main__"], "models")
my_model_pydantic = pydantic_model_creator(models_obj)
https://tortoise-orm.readthedocs.io/en/latest/contrib/pydantic.html#relations-early-init
I have a type, Flag, in stubs/my_types/__init__.py
__all__ = ["Flag"]
Flag = TypedDict(
'Flag', {
'id': int
})
In my main source program, I import this with
from stubs.my_types import Flag
have a function I have annotated with
def do_stuff(thing: int) -> List[Flag]:
I've set the MYPYPATH to where the main source program is, but VsCode still shows the Flag as type Any. How can I get it to show the correct type?
I am making a very simple application with 2 webpages at the moment under URLs: localhost:8080/restaurants/ and localhost:8080/restaurants/new.
I have a sqlite database which i manipulate with SQLAlchemy in my python code.
On my first page localhost:8080/restaurants/, this just contains the lists of restaurants available in my database.
My second page localhost:8080/restaurants/new, is where i have a form in order to a new restaurant such that it displays on localhost:8080/restaurants.
However Whenever i enter a new restaurant name on form at localhost:8080/restaurants/new, it fails to redirect me back to localhost:8080/restaurants/ in order to show me the new restaurant, instead it just remains on the same url link localhost:8080/restaurants/new with the message "No data received" .
Below is my code:
import cgi
from BaseHTTPServer import BaseHTTPRequestHandler, HTTPServer
#import libraries and modules
from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker
from database_setup import Base, Restaurant, MenuItem
#create and connect to database
engine = create_engine('sqlite:///restaurantmenu.db')
Base.metadata.bind=engine
DBSession = sessionmaker(bind=engine)
session = DBSession()
class webServerHandler(BaseHTTPRequestHandler):
""" class defined in the main method"""
def do_GET(self):
try:
#look for url then ends with '/hello'
if self.path.endswith("/restaurants"):
self.send_response(200)
#indicate reply in form of html to the client
self.send_header('Content-type', 'text/html')
#indicates end of https headers in the response
self.end_headers()
#obtain all restaurant names from databse
restaurants = session.query(Restaurant).all()
output = ""
output += "<html><body><a href='/restaurants/new'>Add A New Restaurant</a>"
output += "</br></br>"
for restaurant in restaurants:
output += restaurant.name
output += """<div>
<a href='#'>Edit</a>
<a href='#'>Delete</a>
</div>"""
output += "</br></br>"
output += "</body></html>"
self.wfile.write(output)
print output
return
if self.path.endswith("/restaurants/new"):
self.send_response(200)
self.send_header('Content-type', 'text/html')
self.end_headers()
output = ""
output += "<html><body>"
output += "<h1>Add New Restaurant</h1>"
output += "<form method='POST' enctype='multipart/form-data action='/restaurants/new'>"
output += "<input name='newRestaurant' type='text' placeholder='New Restaurant Name'>"
output += "<input name='Create' type='submit' label='Create'>"
output += "</form></body></html>"
self.wfile.write(output)
return
except IOError:
self.send_error(404, "File %s not found" % self.path)
def do_POST(self):
try:
if self.path.endswith("/restaurants/new"):
ctype, pdict = cgi.parse_header(self.headers.getheader('content-type'))
#check of content-type is form
if ctype == 'mulitpart/form-data':
#collect all fields from form, fields is a dictionary
fields = cgi.parse_multipart(self.rfile, pdict)
#extract the name of the restaurant from the form
messagecontent = fields.get('newRestaurant')
#create the new object
newRestaurantName = Restaurant(name = messagecontent[0])
session.add(newRestaurantName)
session.commit()
self.send_response(301)
self.send_header('Content-type', 'text/html')
self.send_header('Location','/restaurants')
self.end_headers()
except:
pass
def main():
"""An instance of HTTPServer is created in the main method
HTTPServer is built off of a TCP server indicating the
transmission protocol
"""
try:
port = 8080
#server address is tuple & contains host and port number
#host is an empty string in this case
server = HTTPServer(('', port), webServerHandler)
print "Web server running on port %s" % port
#keep server continually listening until interrupt occurs
server.serve_forever()
except KeyboardInterrupt:
print "^C entered, stopping web server...."
#shut down server
server.socket.close()
#run main method
if __name__ == '__main__':
main()
for reference here is my database_setup file where i create the database:
import sys
#importing classes from sqlalchemy module
from sqlalchemy import Column, ForeignKey, Integer, String
#delcaritive_base , used in the configuration
# and class code, used when writing mapper
from sqlalchemy.ext.declarative import declarative_base
#relationship in order to create foreign key relationship
#used when writing the mapper
from sqlalchemy.orm import relationship
#create_engine to used in the configuration code at the
#end of the file
from sqlalchemy import create_engine
#this object will help set up when writing the class code
Base = declarative_base()
class Restaurant(Base):
"""
class Restaurant corresponds to restaurant table
in the database to be created.
table representation for restaurant which
is in the database
"""
__tablename__ = 'restaurant'
#column definitions for the restaurant table
id = Column(Integer, primary_key=True)
name = Column(String(250), nullable=False)
class MenuItem(Base):
"""
class MenuItem corresponds to restaurant table
table representation for menu_item which
is in the database
"""
__tablename__ = 'menu_item'
#column definitions for the restaurant table
name = Column(String(80), nullable=False)
id = Column(Integer, primary_key=True)
course = Column(String(250))
description = Column(String(250))
price = Column(String(8))
restaurant_id = Column(Integer, ForeignKey('restaurant.id'))
restaurant = relationship(Restaurant)
#create an instance of create_engine class
#and point to the database to be used
engine = create_engine(
'sqlite:///restaurantmenu.db')
#that will soon be added into the database. makes
#the engine
Base.metadata.create_all(engine)
I can't figure out why i cannot add new restuarants
I know this was a long time ago, but I figured out your problem.
First, the enctype='multipart/form-data' in your do_GET function under the if self.path.endswith("/restaurants/new"): portion is missing a final single quote. Second, you misspelt 'multipart' in if ctype == 'multipart/form-data':. Hope that can help you or others.
As shteeven said, the problem was with the encryption type in the form.
As the quote was missed, the 'Content-type' changed to 'application/x-www-form-urlencoded' so in that case you should parse it different as it's a string.
In order to manage both enctype you can modify your do_POST as the following
def do_POST(self):
try:
if self.path.endswith("/restaurants/new"):
ctype, pdict = cgi.parse_header(self.headers.getheader('content-type'))
print ctype
#check of content-type is form
if (ctype == 'multipart/form-data') or (ctype == 'application/x-www-form-urlencoded'):
#collect all fields from form, fields is a dictionary
if ctype == 'multipart/form-data':
fields = cgi.parse_multipart(self.rfile, pdict)
else:
content_length = self.headers.getheaders('Content-length')
length = int(content_length[0])
body = self.rfile.read(length)
fields = urlparse.parse_qs(body)
#extract the name of the restaurant from the form
messagecontent = fields.get('newRestaurant')
#create the new object
newRestaurantName = Restaurant(name = messagecontent[0])
session.add(newRestaurantName)
session.commit()
self.send_response(301)
self.send_header('Location','/restaurants')
self.end_headers()
return
Hope this extra information is useful for you!
i have made a simple pyqt gui with QLineEdit and QPushButton. i like to add showurl(in con.py given below) to sqlite db. the code :
ui.py
from PyQt4 import QtCore, QtGui
try:
_fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
def _fromUtf8(s):
return s
try:
_encoding = QtGui.QApplication.UnicodeUTF8
def _translate(context, text, disambig):
return QtGui.QApplication.translate(context, text, disambig, _encoding)
except AttributeError:
def _translate(context, text, disambig):
return QtGui.QApplication.translate(context, text, disambig)
class Ui_Form(object):
def setupUi(self, Form):
Form.setObjectName(_fromUtf8("Form"))
Form.resize(400, 300)
self.verticalLayout_2 = QtGui.QVBoxLayout(Form)
self.verticalLayout_2.setObjectName(_fromUtf8("verticalLayout_2"))
self.verticalLayout = QtGui.QVBoxLayout()
self.verticalLayout.setObjectName(_fromUtf8("verticalLayout"))
self.inserturl = QtGui.QLineEdit(Form)
self.inserturl.setObjectName(_fromUtf8("inserturl"))
self.verticalLayout.addWidget(self.inserturl)
spacerItem = QtGui.QSpacerItem(20, 40, QtGui.QSizePolicy.Minimum, QtGui.QSizePolicy.Expanding)
self.verticalLayout.addItem(spacerItem)
self.insertdb_btn = QtGui.QPushButton(Form)
self.insertdb_btn.setObjectName(_fromUtf8("insertdb_btn"))
self.verticalLayout.addWidget(self.insertdb_btn)
self.verticalLayout_2.addLayout(self.verticalLayout)
self.retranslateUi(Form)
QtCore.QMetaObject.connectSlotsByName(Form)
def retranslateUi(self, Form):
Form.setWindowTitle(_translate("Form", "Form", None))
self.insertdb_btn.setText(_translate("Form", "ok", None))
con.py
import sys
from PyQt4 import QtCore, QtGui, QtSql
from insertdb2_ui import Ui_Form
def createConnection():
db = QtSql.QSqlDatabase.addDatabase('QSQLITE')
db.setDatabaseName('webscrap.db')
if db.open():
return True
else:
print db.lastError().text()
return False
class Test(QtGui.QWidget, Ui_Form):
def __init__(self):
super(Test, self).__init__()
self.setupUi(self)
self.insertdb_btn.clicked.connect(self.onClick)
def onClick(self):
showurl = self.inserturl.text()
print showurl
if __name__ == "__main__":
app = QtGui.QApplication(sys.argv)
if not createConnection():
sys.exit(1)
window = Test()
window.show()
sys.exit(app.exec_())
i made the input data ie. showurl print on terminal. i want to add the showurl to sqlitedb webscrap.db which has fields id and url.
I am also confused about using model view(QSqlTableModel, QDataWidgetMapper).
You can use the QtSql.QSqlQuery() class to create query objects that interact with your database. To execute a query (in this case, an INSERT query), perform the following steps:
Instantiate a QSqlQuery() object.
Call the prepare() method on that object, passing to the prepare() method the SQL text that you want to execute.
Use the addBindValue() method to pass in variables to your query -- in this case, you want to pass in showurl.
Finally, call exec_() on the query object to execute
the query. If there is an error, you can retrieve it by calling on
the query object lastError().text().
So, in code, you would need to change your onClick() function to:
def onClick(self):
showurl = self.inserturl.text()
query_object = QtSql.QSqlQuery()
query_object.prepare("INSERT INTO table (url) VALUES (?)")
query_object.addBindValue(showurl)
if not query_object.exec_():
print query_object.lastError().text()
Please note that I did not specify a table name to insert into because you provided field names (id and url) but not a table name; therefore the query string uses a fake table name (table). You should replace this with a real table name. If you do not have a table in your database, you need to create one. Please reference https://www.sqlite.org/lang.html for documentation on SQLite commands (e.g. for creating tables). Please also refer to the PyQt4 documentation on QtSql.QSqlQuery(): http://pyqt.sourceforge.net/Docs/PyQt4/qsqlquery.html
For QSqlTableModel and QDataWidgetMapper, it is difficult to help without having a specific question to answer about them, but I highly recommend that you check out this excellent guide to both of those classes: http://doc.qt.digia.com/qq/qq21-datawidgetmapper.html. This guide does not use PyQt4 (instead it uses Qt alone, so the code is in C++), but the code is sparse and the concepts should resonate even if you are not familiar with C++.
This code is showing page and category names as objects and not by their respective title. Its supposed to show the names and its showing page objects and category objects instead for all the titles
import os
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'mysite.settings')
import django
django.setup()
from rango.models import Category, Page
def populate():
python_cat = add_cat('Python')
add_page(cat=python_cat,
title="Official Python Tutorial",
url="http://docs.python.org/2/tutorial/")
add_page(cat=python_cat,
title="How to Think like a Computer Scientist",
url="http://www.greenteapress.com/thinkpython/")
add_page(cat=python_cat,
title="Learn Python in 10 Minutes",
url="http://www.korokithakis.net/tutorials/python/")
django_cat = add_cat("Django")
add_page(cat=django_cat,
title="Official Django Tutorial",
url="https://docs.djangoproject.com/en/1.5/intro/tutorial01/")
add_page(cat=django_cat,
title="Django Rocks",
url="http://www.djangorocks.com/")
add_page(cat=django_cat,
title="How to Tango with Django",
url="http://www.tangowithdjango.com/")
frame_cat = add_cat("Other Frameworks")
add_page(cat=frame_cat,
title="Bottle",
url="http://bottlepy.org/docs/dev/")
add_page(cat=frame_cat,
title="Flask",
url="http://flask.pocoo.org")
# Print out what we have added to the user.
for c in Category.objects.all():
for p in Page.objects.filter(category=c):
print ("- {0} - {1}".format(str(c), str(p)))
def add_page(cat, title, url, views=0):
p = Page.objects.get_or_create(category=cat, title=title, url=url, views=views)[0]
return p
def add_cat(name):
c = Category.objects.get_or_create(name=name)[0]
return c
# Start execution here!
if __name__ == '__main__':
print ("Starting Rango population script...")
populate()
What is wrong with the code or is the fault is with another file ? Using python 3.4 and django 1.7. Have I missed a file ? is there an other file I should share?
I had the same problem while studying through django with tango. I missed the method in the rango/modules.py in the class Page.
def str(self): # For Python 2, use unicode too
return self.title
__unicode__(self) seems to be creating the problem for Python-3 . Replace that with __str__(self) and it should work.
from django.db import models
class Category(models.Model):
name = models.CharField(max_length=128, unique=True)
def __str__(self):
return self.name
class Page(models.Model):
category = models.ForeignKey(Category)
title = models.CharField(max_length = 128)
url = models.URLField()
views = models.IntegerField(default=0)
def __str__(self):
return self.title