class Datagrid::Drivers::ActiveRecord
@!visibility private
Public Class Methods
match?(scope)
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# File lib/datagrid/drivers/active_record.rb, line 6 def self.match?(scope) return false unless defined?(::ActiveRecord) if scope.is_a?(Class) scope.ancestors.include?(::ActiveRecord::Base) else scope.is_a?(::ActiveRecord::Relation) end end
Public Instance Methods
append_column_queries(assets, columns)
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# File lib/datagrid/drivers/active_record.rb, line 30 def append_column_queries(assets, columns) if columns.present? if assets.select_values.empty? assets = assets.select(Arel.respond_to?(:star) ? assets.klass.arel_table[Arel.star] : "#{assets.quoted_table_name}.*") end columns = columns.map {|c| "#{c.query} AS #{c.name}"} assets = assets.select(*columns) end assets end
asc(scope, order)
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# File lib/datagrid/drivers/active_record.rb, line 45 def asc(scope, order) # Relation#order isn't able to override already applied order # Using #reorder instead scope.reorder(order) end
batch_each(scope, batch_size, &block)
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# File lib/datagrid/drivers/active_record.rb, line 105 def batch_each(scope, batch_size, &block) if scope.limit_value raise Datagrid::ConfigurationError, "ActiveRecord can not use batches in combination with SQL limit" end options = batch_size ? { batch_size: batch_size } : {} scope.find_each(**options, &block) end
can_preload?(scope, association)
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# File lib/datagrid/drivers/active_record.rb, line 121 def can_preload?(scope, association) !! scope.klass.reflect_on_association(association) end
column_names(scope)
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# File lib/datagrid/drivers/active_record.rb, line 81 def column_names(scope) scope.column_names end
contains(scope, field, value)
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# File lib/datagrid/drivers/active_record.rb, line 85 def contains(scope, field, value) field = prefix_table_name(scope, field) scope.where("#{field} #{contains_predicate} ?", "%#{value}%") end
default_cache_key(asset)
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# File lib/datagrid/drivers/active_record.rb, line 113 def default_cache_key(asset) asset.id || raise(NotImplementedError) end
default_order(scope, column_name)
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# File lib/datagrid/drivers/active_record.rb, line 63 def default_order(scope, column_name) has_column?(scope, column_name) ? prefix_table_name(scope, column_name) : nil end
default_preload(scope, value)
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# File lib/datagrid/drivers/active_record.rb, line 117 def default_preload(scope, value) scope.preload(value) end
desc(scope, order)
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# File lib/datagrid/drivers/active_record.rb, line 51 def desc(scope, order) if order.respond_to?(:desc) scope.reorder(order.desc) else scope.reorder(order).reverse_order end end
greater_equal(scope, field, value)
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# File lib/datagrid/drivers/active_record.rb, line 67 def greater_equal(scope, field, value) scope.where(["#{prefix_table_name(scope, field)} >= ?", value]) end
has_column?(scope, column_name)
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# File lib/datagrid/drivers/active_record.rb, line 75 def has_column?(scope, column_name) scope.column_names.include?(column_name.to_s) rescue ::ActiveRecord::StatementInvalid false end
less_equal(scope, field, value)
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# File lib/datagrid/drivers/active_record.rb, line 71 def less_equal(scope, field, value) scope.where(["#{prefix_table_name(scope, field)} <= ?", value]) end
normalized_column_type(scope, field)
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# File lib/datagrid/drivers/active_record.rb, line 90 def normalized_column_type(scope, field) return nil unless has_column?(scope, field) builtin_type = scope.columns_hash[field.to_s].type { [:string, :text, :time, :binary] => :string, [:integer, :primary_key] => :integer, [:float, :decimal] => :float, [:date] => :date, [:datetime, :timestamp] => :timestamp, [:boolean] => :boolean }.each do |keys, value| return value if keys.include?(builtin_type) end end
reverse_order(scope)
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# File lib/datagrid/drivers/active_record.rb, line 59 def reverse_order(scope) scope.reverse_order end
to_scope(scope)
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# File lib/datagrid/drivers/active_record.rb, line 15 def to_scope(scope) return scope if scope.is_a?(::ActiveRecord::Relation) # Model class or Active record association # ActiveRecord association class hides itself under an Array # We can only reveal it by checking if it respond to some specific # to ActiveRecord method like #scoped if scope.is_a?(Class) scope.all elsif scope.respond_to?(:scoped) scope.scoped else scope end end
where(scope, attribute, value)
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# File lib/datagrid/drivers/active_record.rb, line 41 def where(scope, attribute, value) scope.where(attribute => value) end
Protected Instance Methods
contains_predicate()
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# File lib/datagrid/drivers/active_record.rb, line 131 def contains_predicate defined?(::ActiveRecord::ConnectionAdapters::PostgreSQLAdapter) && ::ActiveRecord::Base.connection.is_a?(::ActiveRecord::ConnectionAdapters::PostgreSQLAdapter) ? 'ilike' : 'like' end
prefix_table_name(scope, field)
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# File lib/datagrid/drivers/active_record.rb, line 127 def prefix_table_name(scope, field) has_column?(scope, field) ? [scope.table_name, field].join(".") : field end