Class: Gauze::Base

Inherits:

Object

• Object
• Gauze::Base

Defined in:

lib/gauze/base.rb

Class Method Summary

• .build(resource, params = {}) ⇒ Object
• .filter(param_key, column_name, arel_method, preprocessor = nil) ⇒ Object

Instance Method Summary

• #build_arel_filter(filter_hash) ⇒ Object
• #build_nodes ⇒ Object
• #initialize(resource, params = {}) ⇒ Base constructor

  A new instance of Base.

Constructor Details

#initialize(resource, params = {}) ⇒ Base

# File 'lib/gauze/base.rb', line 12

def initialize(resource, params = {})
  @resource = resource
  @params = params.symbolize_keys
end

Class Method Details

.build(resource, params = {}) ⇒ Object

# File 'lib/gauze/base.rb', line 8

def self.build(resource, params = {})
  new(resource, params).build_nodes
end

.filter(param_key, column_name, arel_method, preprocessor = nil) ⇒ Object

# File 'lib/gauze/base.rb', line 3

def self.filter(param_key, column_name, arel_method, preprocessor = nil)
  @@filters ||= []
  @@filters.push param_key: param_key, column: column_name, method: arel_method, preprocessor: preprocessor
end

Instance Method Details

#build_arel_filter(filter_hash) ⇒ Object

# File 'lib/gauze/base.rb', line 24

def build_arel_filter(filter_hash)
  filter_val = @params[filter_hash[:param_key]]
  filter_val = filter_hash[:preprocessor].call(filter_val) if filter_hash[:preprocessor]

  @resource.arel_table[filter_hash[:column]].method(filter_hash[:method]).call(filter_val)
end

#build_nodes ⇒ Object

# File 'lib/gauze/base.rb', line 17

def build_nodes
  wheres = applied_filters.map {|obj| build_arel_filter(obj)}
  _query = @resource
  wheres.each {|node| _query = _query.where(node)}
  return _query
end