Class: Resolvers::BaseSearchResolver

Inherits:
Object
  • Object
show all
Defined in:
lib/generators/templates/app/graphql/resolvers/base_search_resolver.rb

Instance Method Summary collapse

Instance Method Details

#arguments_to_h(value) ⇒ Object 



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# File 'lib/generators/templates/app/graphql/resolvers/base_search_resolver.rb', line 16

def arguments_to_h(value)
  if value.is_a? Array
    value.map{ |v| arguments_to_h(v) }
  else
    value.to_h
  end
end

#case_sort(field, sort_direction) ⇒ Object

stackoverflow.com/questions/5826210/rails-order-with-nulls-last



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# File 'lib/generators/templates/app/graphql/resolvers/base_search_resolver.rb', line 99

def case_sort(field, sort_direction)
  case sort_direction
  when 'asc'
    "#{field} asc"
  when 'asc_nulls_first'
    "CASE WHEN #{field} IS NOT NULL THEN 1 ELSE 0 END, #{field} ASC"
  when 'asc_nulls_last'
    "CASE WHEN #{field} IS NULL THEN 1 ELSE 0 END, #{field} ASC"
  when 'desc'
    "#{field} desc"
  when 'desc_nulls_first'
    "CASE WHEN #{field} IS NOT NULL THEN 1 ELSE 0 END, #{field} DESC"
  when 'desc_nulls_last'
    "CASE WHEN #{field} IS NULL THEN 1 ELSE 0 END, #{field} DESC"
  else
    ''
  end
end

#convert_element(values) ⇒ Object 



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# File 'lib/generators/templates/app/graphql/resolvers/base_search_resolver.rb', line 53

def convert_element(values)
  return '' if not has_comparison?(values)

  values[:field] + case values[:operator]
  when 'equal', 'in'
    " in (<var!>#{values[:value].to_json}</var!>)"
  when 'greater_than'
    " > <var!>#{values[:value].to_json}</var!>"
  when 'greater_than_or_equal_to'
    " >= <var!>#{values[:value].to_json}</var!>"
  when 'ilike'
    " ilike <var!>#{values[:value].to_json}</var!>"
  when 'is_null'
    " is #{values[:value].downcase == 'true' ? '' : 'not'} null"
  when 'like'
    " like <var!>#{values[:value].to_json}</var!>"
  when 'less_than'
    " < <var!>#{values[:value].to_json}</var!>"
  when 'less_than_or_equal_to'
    " <= <var!>#{values[:value].to_json}</var!>"
  when 'not_equal', 'not_in'
    " not in (<var!>#{values[:value].to_json}</var!>)"
  when 'not_ilike'
    " not ilike <var!>#{values[:value].to_json}</var!>"
  when 'not_like'
    " not like <var!>#{values[:value].to_json}</var!>"
  when 'not_similar'
    " not similar to <var!>#{values[:value].to_json}</var!>"
  when 'similar'
    " similar to <var!>#{values[:value].to_json}</var!>"
  else
    ''
  end
end

#escape_search_term(term) ⇒ Object 



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# File 'lib/generators/templates/app/graphql/resolvers/base_search_resolver.rb', line 8

def escape_search_term(term)
  "%#{term.gsub(/\s+/, '%')}%"
end

#has_comparison?(values) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/generators/templates/app/graphql/resolvers/base_search_resolver.rb', line 24

def has_comparison?(values)
  values[:field].present? and values[:operator].present? and values[:value].present?
end

#query_where(value) ⇒ Object 



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# File 'lib/generators/templates/app/graphql/resolvers/base_search_resolver.rb', line 12

def query_where(value)
  redefine_values(transform_element(arguments_to_h(value)))
end

#redefine_values(expression) ⇒ Object 



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# File 'lib/generators/templates/app/graphql/resolvers/base_search_resolver.rb', line 88

def redefine_values(expression)
  values = {}
  variables = expression.scan(/<var!>(.+?)<\/var!>/i).flatten.uniq
  for i in 0..(variables.count-1) do
    values["v#{i}".to_sym] = JSON.parse(variables[i])
    expression = expression.gsub("<var!>#{variables[i]}</var!>", ":v#{i}")
  end
  [expression, values]
end

#transform_element(v, and_or_check = true) ⇒ Object 



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# File 'lib/generators/templates/app/graphql/resolvers/base_search_resolver.rb', line 28

def transform_element(v, and_or_check = true)
  and_or = and_or_check ? ' and ' : ' or '
  values = v.clone
  return '' if values.nil?
  if values.is_a? Array
    return "(#{values.map{ |v| transform_element(v) }.join(and_or)})"
  elsif values.is_a? Hash
    if values[:_or].present?
      values[:_or].push({field: values[:field], operator: values[:operator], value: values[:value]}) if has_comparison?(values)
      return transform_element(values[:_or], false) 
    elsif values[:_and].present?
      values[:_and].push({field: values[:field], operator: values[:operator], value: values[:value]}) if has_comparison?(values)
      return transform_element(values[:_and], true)
    elsif values[:_not].present?
      addon = has_comparison?(values) ? convert_element(values) + and_or : ''
      res = transform_element(values[:_not], and_or_check)
      return "#{addon}not (#{res.is_a?(String) ? res : res.join(and_or)})"
    else
      return convert_element values
    end
  else
    return values
  end
end