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28 lines
700 B
28 lines
700 B
class Department < ApplicationRecord
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belongs_to :school
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has_many :department_members, dependent: :destroy
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after_create_commit :reset_data_cache
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after_update_commit :reset_data_cache
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def self.cached_names_data(school)
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Rails.cache.fetch(names_data_cache_key(school.id), expires_in: 7.days) do
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school.departments.select(:id, :name).as_json
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end
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end
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private
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def reset_data_cache
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# 清除部门名称缓存
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if new_record? || name_previously_changed?
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Rails.cache.delete(self.class.names_data_cache_key(school_id))
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end
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end
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def self.names_data_cache_key(school_id)
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"schools/#{school_id}/department_names_data"
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end
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end
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