Category: Data ORM

Tech Tutorial: Learning MongoDB and Mongoose – Episode 05: Collections Explained

MongoDB documents hold data and often times that data belongs to specific categories or groups. For this purpose, MongoDB has what we call collections to group related documents together. In this video, we walk through the concept of collections in MongoDB.

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Tech Tutorial: Learning MongoDB and Mongoose – Episode 04: Documents Explained

MongoDB is a document database. In this database, we will discuss the concept of a document within the MongoDB.

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Tech Tutorial: Learning MongoDB and Mongoose – Episode 03: MacOS Installation

In this video, we will run through installing MongoDB on a MacOS machine.

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Tech Tutorial: Learning MongoDB and Mongoose – Episode 02: Windows Installation

In this video, we will run through installing MongoDB on a Windows machine.

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Tech Tutorial: Learning MongoDB and Mongoose – Episode 01: MongoDB Overview

Data is the lifeblood of the Internet and where there is data, there is a need for a place to store it so we can retrieve it and use it. Databases are the primary solution to this problem and there are many different types of databases designed to address different needs, use cases, and data types.

In modern web applications, you will mostly find either a relational database or a document database backing pretty much any system you run into. In this video, we introduce you to the MongoDB document database.

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Rails 4: gem install pg (when using the Postgresql App on OS X)

If you are getting a build error from Gem when trying to install the PostgreSQL gem called ‘pg’ and you are using the PostgreSQL App instead of installing PostgreSQL via Brew or some other method, it is because Gem cannot find the PostgreSQL config in the standard locations. To correct this you need to provide Gem with the path to the config file stored within the PostgreSQL App’s internal folder structure.

This can be done as follows:

gem install pg -- --with-pg-config=/Applications/Postgres.app/Contents/Versions/9.4/bin/pg_config

<update: for latest versions of Postgres.app>

gem install pg -- --with-pg-config=/Applications/Postgres.app/Contents/Versions/latest/bin/pg_config

Another way to accomplish this is:

export CONFIGURE_ARGS=”with-pg-include=/Applications/Postgres.app/Contents/Versions/9.4/include/”
gem install pg

Note: the latest version of the PostgreSQL App, at the time of this writing was 9.4, your version may be different. Make sure you change the 9.4 in the config path in the command above to the one you are using or it will not work. You can verify the path by opening Finder, going to the Applications folder, locating Postgres.app, right clicking and selecting ‘show package contents’. This will open up the app’s folder structure in Finder.