62 lines
1.7 KiB
Ruby
62 lines
1.7 KiB
Ruby
class Keystore < ActiveRecord::Base
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validates_presence_of :key
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attr_accessible nil
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def self.get(key)
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Keystore.find_by_key(key)
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end
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def self.put(key, value)
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if Keystore.connection.adapter_name == "SQLite"
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Keystore.connection.execute("INSERT OR REPLACE INTO " <<
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"#{Keystore.table_name} (`key`, `value`) VALUES " <<
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"(#{q(key)}, #{q(value)})")
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else
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Keystore.connection.execute("INSERT INTO #{Keystore.table_name} (" +
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"`key`, `value`) VALUES (#{q(key)}, #{q(value)}) ON DUPLICATE KEY " +
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"UPDATE `value` = #{q(value)}")
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end
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true
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end
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def self.increment_value_for(key, amount = 1)
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self.incremented_value_for(key, amount)
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end
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def self.incremented_value_for(key, amount = 1)
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new_value = nil
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Keystore.transaction do
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if Keystore.connection.adapter_name == "SQLite"
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Keystore.connection.execute("INSERT OR IGNORE INTO " <<
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"#{Keystore.table_name} (`key`, `value`) VALUES " <<
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"(#{q(key)}, 0)")
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Keystore.connection.execute("UPDATE #{Keystore.table_name} " <<
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"SET `value` = `value` + #{q(amount)} WHERE `key` = #{q(key)}")
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else
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Keystore.connection.execute("INSERT INTO #{Keystore.table_name} (" +
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"`key`, `value`) VALUES (#{q(key)}, #{q(amount)}) ON DUPLICATE KEY " +
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"UPDATE `value` = `value` + #{q(amount)}")
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end
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new_value = self.value_for(key)
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end
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return new_value
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end
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def self.decrement_value_for(key, amount = -1)
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self.increment_value_for(key, amount)
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end
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def self.decremented_value_for(key, amount = -1)
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self.incremented_value_for(key, amount)
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end
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def self.value_for(key)
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self.get(key).try(:value)
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end
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end
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