This is a place to share common problems and solutions to them.
Sometimes, you are trying to build an amber project in a new machine and crystal doesn't have all dependencies required by default. Then, ensure to install all development packages for openssl git, yaml, libevent, and sqlite3, postgresql, or mysql.
{% hint style="info" %} Also see Installation Guide {% endhint %}
Sometimes, you're trying to run your amber project and you get an database connection error. Then, ensure your database is running and the database_url is well specified on config/environments/{your-enviroment-file}.yml, or on DATABASE_URL environment variable. Also remember to run bin/amber db drop create migrate , before executing your project.
{% hint style="info" %} Also see Creating the Database {% endhint %}
On new crystal 0.25.0 release, the shards command has a global cache issue, already reported here and fixed on next version. Until crystal 0.25.1 is released, you can fix your dependencies by removing global shards cache and shards files.
rm -rf ~/.cache/shards
rm -rf shard.lock
rm -rf lib
Ask around on the Amber Gitter channel, or create an issue.
If you figure it out, edit this document as a courtesy to the next person having the same problem.