Seraph, toolkit for data mapping and querying Neo4j

[domvas]

Thank for the kind words! It makes me think that the package is useful

@swelham

Support a non global config. Allow the config to be specified per instance of Repo in the supervision tree. This provides more flexibility and if the user wants a global config they can still do it.

What is the goal? Having the ability to connect / disconnect from database at runtime?
In fact, this update is quite trivial and can (will) be added.
Keep in mind that multi-tenancy is already supported and that in Neo4j, you can manage multiple databases on the same server (Managing Multiple Databases in Neo4j - Developer Guides)

@swelham

Default datetimes to utc_datetime_usec . I believe this plays better with Elixir’s datetime module (no need for Datetime.truncate everywhere) and I seem to remember reading that the ecto core team wish they did this but now can’t due to backwards compatibility.

Noted.
I haven’t implement the timestamps macro so it will be with utc_datetime_usec.
In fact, the date format in Neo4j is converted to datetime with microseconds in Elixir so I already get bitten when I used utc_datetime for the example

@swelham

Support having snake case schema fields. I see the rational in enforcing camel case but as it’s not idiomatic Elixir it will end up forcing some inconsistency in the user’s application. This seems more like a db implementation detail and I think it should be possible to support snake case fields and then convert to camel case in the queries when dealing with the db.

I think you’re not going to be the last to have remarks on this point.
In any case, there’s a tradeoff:

• CamelCase enforcing → atom with uppercase are not idiomatic (except for modules…) but valid.
• snake_cased + conversion → you have to switch when you are writing query with seraph or writing query in pure cypher and this can be subject to errors
• snake_cased without conversion → it’s not what’s recommended for Neo4j
  One in all, the best thing I can do is to implement all 3, defaulting to CamelCased and add config options to let each user decide what he prefers