Start support for multiple databases.

Author: blambeau

examples/multi-db/Dockerfile

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+FROM enspirit/dbagent
+
+COPY initdb     /home/app/initdb
+COPY migrations /home/app/migrations
+COPY data       /home/app/data

examples/multi-db/README.md

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+# Multiple databases managed through DbAgent
+
+This example provides a basic configuration to maintaing multiple databases
+on the same postgresql server.
+
+## Get started
+
+```
+docker-compose up
+```
+
+In another terminal, let migrate & spy the database:
+
+```
+docker-compose exec dbagent bash
+rake db:ping
+rake db:migrate
+rake db:spy
+```
+
+You can browse the database schema in a web browser:
+
+```
+http://127.0.0.1:8080/schema/
+```
+
+Let now install some data, then look at it:
+
+```
+echo "SELECT * FROM todo" | rake db:repl
+curl -X POST http://127.0.0.1/seeds/install -d "id=test"
+echo "SELECT * FROM todo" | rake db:repl
+```

examples/multi-db/data/base/db1/01-todo.json

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+[
+  {
+    "id": 1,
+    "title": "Write more documenation",
+    "description": "Get started guide should probably be longer",
+    "done": false
+  }
+]

examples/multi-db/data/base/db1/after_seeding.sql

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+{ "inherits": "empty" }

examples/multi-db/data/base/db1/before_seeding.sql

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+[]

examples/multi-db/data/base/db1/metadata.json

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+{}