Spring Roo Tip

Posted on December 28, 2012 by acatejr

I’ve been working on a Spring Roo application and needed to add a domain class used to model application users. I tried using the default Roo command for adding the User domain class “entity jpa –class ~.domain.User –testAutomatically”, but Roo does not like that method because the name “User” is a reserved word in SQL. However, you can overwrite the command and force Roo to create a User class by adding –permitReservedWords to the command (entity jpa –class ~.domain.User –permitReservedWords –testAutomatically). I’m not sure if this is the most secure way to do things, but it is an option.

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Maven Tip

Posted on November 30, 2012 by acatejr

Here is a maven command to list all of the jar files that project is dependent on:

mvn dependency:list

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Getting Current IP Address in Python

Posted on November 29, 2012 by acatejr

The following code example retrieves the current ip address. I know this works for Python 2.7.

import socket
ip_addr = socket.gethostbyname(socket.gethostname())

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Useful Unix Command

Posted on August 1, 2012 by acatejr

I’m a fan of cygwin. I needed a command alias for listing only directories using the ls command, so here is what I came up with:

ls -l | grep “^d”

I then added an alias to my .bashrc file like so:

alias ld=’ls -l | grep “^d”‘

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A New Word

Posted on June 14, 2012 by acatejr

Today I was working on a function to convert a map coordinate from degrees-minutes-second format (e.g., 125° 23′ 42” W) to decimal degrees (e.g., -125.395) and I came across the word Sexagesimal. It is not profanity.

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Django Fixtures and Dumping Test Data

Posted on May 4, 2012 by acatejr

I do quite a bit of work with the Python based Django framework.  Django is a flexible framework that leverages the Python programming language.  A typical development scenario for development using Django involves writing models and/or views then running unit tests to see if these changes break the application.  If you create test data for the unit tests using Django’s fixtures then you might have used Django’s “manage.py dumpdata” to export test and development data to one of your application’s fixtures.  If you have used the dumpdata command then you may be experience an error message when running the unit tests that indicates a primary key error when loading “contenttypes”.  The unit tests will run, but this warning can be troublesome.  There is a simple solution. When using dumpdata specify the “-e contenttypes” switch to exclude the “contenttypes” model.  I also suggest specifying “-e contenttypes -e auth”.  This should eliminate the primary key error or warning message when you run the unit test.

Refer to this link for more information.

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Ecosystem Web Services

Posted on March 26, 2012 by acatejr

Over the last few months I’ve been volunteering some of my time to develop web services that deliver geospatial data for eco-systems. My eco-system web services help support the AFS Standard Methods for Sampling North American Fishes website. The initial version of the eco-services site can be found here. Right now the eco-services site only provides level 1 eco-region data as described here. The eco-service is accessed through a REST and JSONP call. Future enhancements are on the horizon.

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Grails 2.0 – PostgreSQL

Posted on February 11, 2012 by acatejr

I’ve been working on a Grails 2.0 app that uses PostgreSQL as the back-end db. One of the tables I have been designing is a Users table, which I named “user”. PostgreSQL doesn’t seem to like “User” as a table name, at least not in the context of the Grails/Hibernate sql generation tools. Consequently, in the domain model for the User class I had to set the table name to something other than “user”. In the model’s Groovy class I set the following:


static mapping = { table "tblUser" }

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HTML Output from Rails Helper

Posted on December 18, 2011 by acatejr

In order to render html returned from a Rails (3) helper the returning string should have the .safe_html method. Here is an example:

def my_custom_tag
html = ''
html Hello'
html.safe_html
end

 

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Moving Window Between Monitors in Windows (7)

Posted on December 4, 2011 by acatejr

If using a laptop connected to an external monitor and an application window is displaying on one monitor, but you want it on another you can press SHIFT + WINDOW + LEFT/RIGHT ARROW to move the window between monitors.

 

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