Class: Redis::TimeSeries::Filters

Inherits:
Object
  • Object
show all
Defined in:
lib/redis/time_series/filters.rb

Defined Under Namespace

Classes: Absent, AnyValue, Equal, NoValues, NotEqual, Present

Constant Summary collapse

TYPES = 
[Equal, NotEqual, Absent, Present, AnyValue, NoValues]

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(filters = nil) ⇒ Filters

Returns a new instance of Filters.



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# File 'lib/redis/time_series/filters.rb', line 114

def initialize(filters = nil)
  @filters = case filters
             when String then parse_string(filters)
             when Hash then parse_hash(filters)
             else []
             end
end

Instance Attribute Details

#filters ⇒ Object (readonly)

Returns the value of attribute filters.



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# File 'lib/redis/time_series/filters.rb', line 112

def filters
  @filters
end

Instance Method Details

#to_a ⇒ Object 



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# File 'lib/redis/time_series/filters.rb', line 130

def to_a
  filters.map(&:to_s)
end

#to_h ⇒ Object 



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# File 'lib/redis/time_series/filters.rb', line 134

def to_h
  filters.reduce({}) { |h, filter| h.merge(filter.to_h) }
end

#to_s ⇒ Object 



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# File 'lib/redis/time_series/filters.rb', line 138

def to_s
  to_a.join(' ')
end

#valid? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/redis/time_series/filters.rb', line 126

def valid?
  !!filters.find { |f| f.is_a?(Equal) || f.is_a?(AnyValue)}
end

#validate! ⇒ Object 



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# File 'lib/redis/time_series/filters.rb', line 122

def validate!
  valid? || raise(FilterError, 'Filtering requires at least one equality comparison')
end