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## Influxer

**NOTE**: Version 0.3.x supports InfluxDB >= 0.9.0. For InfluxDB 0.8.x use [version 0.2.5](https://github.com/palkan/influxer/tree/0.2.5).

**NOTE**: Influxer is Rails 5 compatible!

Influxer provides an ActiveRecord-style way to work with [InfluxDB](https://influxdb.com/) with many useful features, such as:
- Familar query language (use `select`, `where`, `not`, `group` etc).
- Support for Regex conditions: `where(page_id: /^home\/.*/) #=> select * ... where page_id=~/^home\/.*/`.
- Special query methods for InfluxDB: 
    - `time` - group by time (e.g. `Metrics.time(:hour) => # select * ... group by time(1h)`);
    - `past` - get only points for last hour/minute/whatever (e.g. `Metrics.past(:day) => # select * ... where time > now() - 1d`);
    - `since` - get only points since date (e.g. `Metrics.since(Time.utc(2014,12,31)) => # select * ... where time > 1419984000s`);
    - `merge` - merge series.
- Scopes support
    ```ruby
    class Metrics < Influxer::Metrics
        default_scope -> { time(:hour).limit(1000) }
        tags :account_id
        attributes :value
        scope :unlimited, -> { limit(nil) }
        scope :by_account, -> (id) { where(account_id: id) if id.present? }
    end

    Metrics.by_account(1)
    # => select * from "metrics" group by time(1h) where account_id=1 limit 1000

    Metrics.unlimited.by_account(1).time(:week)
    # => select * from "metrics" group by time(1w) where account_id=1

    ```
- Integrate with your model:
    ```ruby
    class UserVisits < Influxer::Metrics
    end
    
    class User < ActiveRecord::Base
        has_metrics :visits
    end

    user = User.find(1)
    user.visits.write(page_id: 'home')
    #=> < creates point {user_id: 1, page_id: 'home'} in 'user_visits' series >

    user.visits.where(page_id: 'home')
    #=> select * from user_visits where page_id='home'
    ```
    
Find more on [Wiki](https://github.com/palkan/influxer/wiki).