What problems are spring, Django, Rails, Express and other framework technologies emerging to solve? In what areas are these frameworks used now?
python ruby node.js Write your review! Come on, watch it all Member login | User registration Recommended reading cpython Development Notes: The Road to Python Part 1: First Introduction to Python Preface: This article is organized by the editor of Programming Notes#. It mainly introduces the first part of the road to Python: getting to know Python-related knowledge for the first time. I hope it will be of certain reference value to you. Introduction to Python&… [detailed] Crayon Shin-chan 2023-10-17 18:58:48 ip Why are programming languages created by designers more popular? Introduction: In the world of programming, there are many languages, and most of the truly widely popular languages are not the products of academia, but are designed through free play. and those… [detailed] Crayon Shin-chan 2023-10-17 15:22:41
Python development WebService tutorial series: REST, web.py, eurasia, Django
In the field of Bioinformatics (bioinformatics), WebService is a very important data exchange technology and will become even more important in the future. Currently, the WebService provided by EBI has two services: SOAP and REST, whether it is data service or computing service (computing task submission). 1 Python + SOAP/WSDL/UDDI The most common approach (personal opinion) is to use python ZSI2.0. ZSI also relies on LIBs such as SOAPpy and pyXML. Many people are familiar with the SOAP protocol. Many existing applications also use Java and other languages to develop the server side. In addition to Java, most scripting languages can also be used for the client side. For information about the use of python ZSI, please refer to this article on IBM DW: Using python to develop Web Service 2 Python + REST The term REST is indeed very popular at the moment; so how to choose technology when using Python for REST development? ? ? In fact, anyone who has been exposed to python web should know Django, a typical REST style WEB framework! ! ! So in actual development, how do we choose? (1 If you are not an architect and do not pursue the resource-oriented concept…
What problems are spring, Django, Rails, Express and other framework technologies emerging to solve? In what areas are these frameworks used now?
python ruby node.js Write your review! Come on, watch it all Member login | User registration Recommended reading java Development Notes: The Road to Python Part 1: First Introduction to Python Preface: This article is organized by the editor of Programming Notes#. It mainly introduces the first part of the road to Python: getting to know Python-related knowledge for the first time. I hope it will be of certain reference value to you. Introduction to Python&… [detailed] Crayon Shin-chan 2023-10-17 18:58:48 java Learn RN environment quickly and run demo (1) RN is ReactNative, which is a cross-platform framework based on the React framework for mobile devices. Before learning RN, it is recommended to familiarize yourself with html, css, and js. Of course, if you are in a hurry, then just get started. After all, it takes time to learn the previous basics, R… . [detailed] Crayon Shin-chan 2023-10-17 15:29:16
Python development WebService tutorial series: REST, web.py, eurasia, Django
In the field of Bioinformatics, WebService is a very important data exchange technology and will become even more important in the future. Currently, the WebService provided by EBI has two services: SOAP and REST, whether it is data service or computing service (computing task submission). 1 Python + SOAP/WSDL/UDDI The most common approach (personal opinion) is to use python ZSI2.0. ZSI also relies on LIBs such as SOAPpy and pyXML. Many people are familiar with the SOAP protocol. Many existing applications also use Java and other languages to develop the server side. In addition to Java, most scripting languages can also be used for the client side. For information about the use of python ZSI, please refer to this article on IBM DW: Using python to develop Web Service 2 Python + REST The term REST is indeed very popular at the moment; so how to choose technology when using Python for REST development? ? ? In fact, anyone who has been exposed to python web should know Django, a typical REST style WEB framework! ! ! So in actual development, how do we choose? (1 If you are not an architect and do not pursue the resource-oriented concept of…
Django, Apache2 on top of the Apache Kubernetes engine, writes OpencensusTraces to StackdriverTrace
I have a Django web application from Apache2 with mod_wsgi inside a docker container running on a Kubernetes cluster in Google Cloud Platform, protected by an Identity-Aware proxy. Everything is fine, but I want to send GCP for all requests Stackdriver tracking without writing one for each view in my project. I found out using Opencensus to handle this middleware. I looked through the documentation and found the solution by specifying StackdriverExporter and passing project_idparameter is passed as Project Number for my project’s Google Cloud Platform to manually generate traces exported to Stackdriver Trace in the project. Now to automate all requests, I set up the middleware as instructed. In settings.py, I added the modules INSTALLED_APPS, MIDDLEWARE and set OPENCENSUS_TRACE options dictionary. I also added OPENCENSUS_TRACE_PARAMS. This works great using the default export “opencensus.trace.exporters.print_exporter.PrintExporter”, which I see for trace and span information , including the trace ID, and all the details in my Apache2 web server logs. However, I want to send these to my Stackdriver Trace processor for analysis. I tried setting the EXPORTER parameter to opencensus.trace.exporters.stackdriver_exporter.StackdriverExporter, which works when running manually from the shell as long as you provide the project number. When set up to use StackdriverExporter,…
Django, ReactJS, Webpack hot reload
I’ve been trying to setup a react component in django with the help of webpack 4. To get me started, I read the following carefully: Use Webpack with Django + hot reload React components as a bonus Tutorial: Django REST with React (Django 2.0 and some tests) Both walkthroughs are very good. Finally, even though I did use django 1.11, I was able to get it to work by following the second link. The problem I encountered after following the second link is that hot reloading does not work when using webpack-dev-server. The problem is that while main.js can be read, django cannot read the output file of webpack-dev-server (giving a 404 error). I’ve read that dev-server files only exist in memory by default. To overcome error 404 on hot-reloaded files, install the package write-file-webpack-plugin to write out each reload. Then changed webpack-config.js to (I removed a few lines to make it shorter….): var path = require(‘path’); //webpack is not needed since I removed it from plugins //const webpack = require(‘webpack’); var BundleTracker = require(‘webpack-bundle-tracker’); var WriteFilePlugin =require(‘write-file-webpack-plugin’); module.exports = { module: { rules: [ { test: /\.js$/, exclude: /node_modules/, use: { loader: “babel-loader” } }, ] }, entry: […
Django, can’t log in after creating user
1> Alasdair..: You should have used the create_user method in order to correctly The password has been hashed: User.objects.create_user(username=’user’, password=’password’, email=’someemail’) If you want users to have access to the Django admin, set the following is_staff=True: User.objects.create_user(username=’user’, password=’password’, email=’someemail’, is_staff=True) You can fix an existing user’s password set_password in the Django shell using the following command: user = User.objects.get(username=’user’) user.set_password(‘password’) user.is_staff = True # allow user to log in to Django admin user.save()
Django, when using ForeignKey fields, which is better, blank=True or null=True?
From: https://docs.djangoproject.com/en/2.0/ref/models/fields/#django.db.models.Field.null Avoid using null on string-based fields such as CharField and TextField. If a string-based field has null=True, it means it has two possible values for “no data”: NULL and the empty string. In most cases, using two possible values for “no data” is redundant; the Django convention is to use the empty string, not NULL. So what is better in the ForeignKey field? ForeignKey fields are not string-based fields, aren’t they? I want to know what is convention for ForeignKey in django. null = really better or blank = really better? In terms of performance, convenience or otherwise. 1> neverwalkalo..: This is different. See documentation: Note that this is different from null. null is purely database related, while blank is validation related. If the field’s blank value is True, form validation will allow a null value to be entered. Required if the field’s blank is False. So, for ForeignKey, you need to set both: null=True, blank=True.
Django, filter by specified month and year within date range – Django, filterbyspecifiedmonthandyearindaterange
I have the following models I have the following model class Destination_Deal(models.Model): name = models.CharField(_(“Nombre”),max_length=200) class Departure_Date(models.Model): date_from= models.DateField(_(‘Desde’)) date_to= models.DateField(_(‘Hasta’)) destination_deal = models.ForeignKey(Destination_Deal,verbose_name = _(“Oferta de Destino”)) This is the actual data in the table departure_date This is the actual data from table departure_date. id date_from date_to destination_deal_id 1 2012-11-01 2013-03-17 1 2 2012-11-01 2012-12-16 2 3 2012-09-16 2012-10-31 3 4 2012-11-01 2012-12-16 3 5 2013-01-04 2013-01-11 4 I would like to filter the Destination_Deals if a specified month&year is between date_from and date_to. I want to filter Destination_Deals if the specified month and day are between date_from and date_to. Example 1 Example 1 Month: September (09) Year: 2012 Month: September 2012 Wanted departure dates result: ID 3 : It is the only data range that touch 09/2012 Desired departure date results: ID 3: This is the only data range touching 09/2012 Example 2 Example 2 Month: February (02) Year: 2013 Month: February 2013: 2013 Wanted departure dates result: ID 1 : 02/2012 is before 03/2012 Want results for departure date: ID 1: 02/2012 is before 03/2012. So, the day actually is does not matter. If the month&year is between date_from and date_to, even if it is by one…
Django, how to refer to each other ORM-wise in a many-to-many relationship in self class?
You should pass the symmetrical attribute as False. From the documentation: When Django processes this model, it will determine that its ManyToManyField itself has it, so it will not followers add attributes to the User class. Instead, ManyToManyField assumes symmetry – that is, if I am your follower, you are my follower. If you do not want to maintain symmetry in a many-to-many relationship with self, set symmetrical to False strong>. This will force Django to add a descriptor for the reverse relationship, allowing the ManyToManyField relationship to be asymmetric. In your case: class User(models.Model): #… following = models.ManyToManyField(‘self’, related_name=’followers’, symmetrical=False) #… Then, you views.py can access both at the same time: following = user.following.all() followers = user.followers.all() From now on, the relationship with self is asymmetric. 1> wencakisa..: You should pass the symmetrical attribute as False. From the documentation: When Django processes this model, it will determine that its ManyToManyField itself has it, so it will not followers add attributes to the User class. Instead, ManyToManyField assumes symmetry – that is, if I am your follower, you are my follower. If you do not want to maintain symmetry in a many-to-many relationship with self, set symmetrical to False strong>.…
