Jam.py (web framework): Difference between revisions

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| screenshot = File:Screenshot from 2024-05-23 09-42-54.png

| caption = Screenshot of Parameters, with the visual form editor being used to create an application

| author = Andrew Yushev

| released = {{Start date and age|2015|07|01}}

| latest release version = {{wikidata|property|reference|edit|P348}}

| latest release date = {{start date and age|{{wikidata|qualifier|P348|P577}}}}

| genre = [[Web framework]]

| license = [[BSD licenses#3-clause |BSD 3-clause]]

| websiterepo = {{URL|https://jampyapplicationbuildergithub.com/}}jam-py-v5/

| programming language = [[Python (programming language)|Python]], [[JavaScript (programming language)|JavaScript]]

| repo = https://github.com/jam-py-v5/jam-py

| platform = [[Cross-platform software|Cross-platform]]

| programming language = [[Python (programming language)|Python]], [[JavaScript (programming language)|JavaScript]]

| website = {{URL|jampyapplicationbuilder.com}}

| platform = [[Cross-platform]]

| author = Andrew Yushev

}}

'''Jam.py''' is [[freeWeb and open source|free and open-sourceframework]] providing [[Low-code development platform|low-code]]/ and [[No-code_development_platformcode development platform|no-code]], full [[Web framework|"fullsolution stack"]] [[Webrapid Serverapplication Gateway Interface|WSGIdevelopment]] using [[rapidWeb applicationServer developmentGateway Interface]] framework(WSGI), for the [[programming language]]s [[JavaScript]] and [[Python (programming language)|Python]] programming language.<ref>{{Cite web |url=https://wiki.python.org/moin/WebFrameworks/ |title=WebFrameworks - Python Wiki|website=wiki.pythonPython Wiki.org}}</ref> It is [[free and open-source software]] released under a [[BSD licenses#3-clause|BSD 3-clause]] license.

Jam.py version 5.x is a [[Single-page application|single-page]], [[Event-driven architecture|event driven]] [[low-code development platform]] for [[database]]-driven business [[web application]]s, based on the [[don't repeat yourself]] (DRY) principle, with emphasis on [[create, read, update and delete]] (CRUD). It is designed to automatically create [[JavaScript]] [[HTML form|web forms]] from the underlying database tables, although a form can be created manually if required. The existing database tables can be imported into Jam.py to create the forms and reports. Database views are unsupported for import.

It offersprovides a built-in web server, [[Graphicalgraphical user interface builder|]] (named Application Builder]]), and database access forincluding third-party databases.

Jam.py is a [[Single-page_application| Single-page]], [[Event-driven architecture|event driven

]] [[low-code development platform]] for database-driven business [[web application]]s, based on [[DRY principle]], with emphasis on [[Create, read, update and delete|CRUD]].

It is designed to automatically create JavaScript [[web forms]] from the underlying database tables, although a form can be created manually if required.

Jam.py version 7.x supports routing within the [[Single-page application|single-page]]. Uniform resource locator ([[URL]]) mapping is unsupported.

It offers a built-in web server, [[Graphical user interface builder|Application Builder]] and database access for third-party databases.

== Features ==

* Singlev5.x is a single distribution which runs with both Python 2.6+ and 3.x

* v7.x runs with Python >3.6, and is using dependencies installed automatically

* Can run as a standalone web development server or be used with any web server which supports [[WSGI]]

* Built-in [[Graphical user interface builder|GUI builder]] callednamed Application Builder

* Support for [[JSON]] client data (for Representational State Transfer ([[REST]]) and [[JavaScript]] clients)

* Support for popular databases [[Oracle Database]], [[Microsoft SQL Server]], [[PostgreSQL]], [[SQLite]], [[MySQL]], [[Firebird (database server)]], SQLCipher<ref>{{cite web |title=SQLCipher |url=https://github.com/sqlcipher |website=GitHub |language=en}}</ref><ref group=Note>{{Cite web|url=https://jampy-docs.readthedocs.io/en/latest/admin/project/database.html|title=Database — Jam.py documentation|website=jam-py.com}}</ref>

* Extensible [[authentication]] mechanisms and [[role-based access control]]

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* [[Template engine (web)|Template language]]

* [[OpenDocument|Reports Templates]] based on [[LibreOffice]]

* Files upload and camera capturing

* Optimistic locking

==Distinctive features==

=== Built-in Applicationapplication Builderbuilder ===

All [[Software development|development]], [[Software maintenance|maintenance]] and remote database administration can be performed via Builder interface. The most distinctive feature is the Client and Server Module. The Server Module enables the Python code for business logic, executed as a [[server-side]] session. The Client Module executes the JavaScript code within a browser. It is possible to exchange data between the two.

<ref>[https://www.linux-magazine.com/Issues/2020/241/Jam.py Building a database front end with Jam.py]</ref>

Application Builder is strongly influenced by [[Delphi_Delphi (software)|Delphi]] visual designer.<ref>[https://www.webprecis.com/best-frameworks-for-web-design Best Frameworks for Web Design]</ref>

=== Application Builderbuilder Clientclient Modulemodule ===

This JavaScript [["Hello, World!" program]] code displays a simple web page when visited:

The following JavaScript code shows a simple web page that displays "[["Hello, World!" program|Hello World]]!" when visited:

<syntaxhighlight lang="javascript">

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The above code resides in Task/Client Module(s) within the Application Builder. The task function can be accessed globally.

=== Application Builderbuilder Serverserver Modulemodule ===

The Python libraries can be imported within the Task/Server Module(s):

<syntaxhighlight lang="python">

import smtplib

def send_email():

# code that sends email

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=== Database migrations ===

Jam.py supports database [[Data migration|migration]] and data import from one supported database to another.

The below code in the Task/Server Module will import data from SQLite to application database:

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<syntaxhighlight lang="python">

from jam.db.db_modules import SQLITE

def on_created(task):

task.copy_database(SQLITE, '"demo.sqlite'")

</syntaxhighlight>

Limits:

Limitations:

* The SQLite database can notcannot be imported into the application database which has [[Foreign_key|foreign keyskey]]s.<ref>[https://jampyapplicationbuilder.com/docs/how_to/how_to_migrate_to_another_database.html How to migrate to another database]</ref>

== PythonAnywhere ==

[[PythonAnywhere]] Python 3.x deployment is supported<ref group=Note>{{Cite web |url=https://github.com/pythonanywhere/help_pages/blob/master/articles/Jampy.md |title=pythonanywhere/help_pages |website=GitHub |date=11 October 2021}}</ref>

[[PythonAnywhere]] Python 3.x deployment is supported<ref group=Note>{{Cite web|url=https://github.com/pythonanywhere/help_pages/blob/master/articles/Jampy.md|title=pythonanywhere/help_pages|website=GitHub|date=11 October 2021}}</ref>

==Notes==

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* [[Comparison of server-side web frameworks|Comparison of web frameworks]]

* [[List of low-code development platforms]]

{{Clear}}

== External links ==

* {{Official website|jampyapplicationbuilder.com}}

* {{GitHub|jam-py-v5}}

{{Python (programming language)}}

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[[Category:Python (programming language) web frameworks]]

[[Category:Low Code Application Platform]]

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[[Category:Articles with example JavaScript code]]