53 lines
1.8 KiB
Ruby
53 lines
1.8 KiB
Ruby
module Gitlab
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module Database
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# Model that can be used for querying permissions of a SQL user.
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class Grant < ActiveRecord::Base
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self.table_name =
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if Database.postgresql?
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'information_schema.role_table_grants'
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else
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'information_schema.schema_privileges'
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end
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# Returns true if the current user can create and execute triggers on the
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# given table.
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def self.create_and_execute_trigger?(table)
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if Database.postgresql?
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# We _must not_ use quote_table_name as this will produce double
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# quotes on PostgreSQL and for "has_table_privilege" we need single
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# quotes.
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quoted_table = connection.quote(table)
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begin
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from(nil)
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.pluck("has_table_privilege(#{quoted_table}, 'TRIGGER')")
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.first
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rescue ActiveRecord::StatementInvalid
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# This error is raised when using a non-existing table name. In this
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# case we just want to return false as a user technically can't
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# create triggers for such a table.
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false
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end
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else
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queries = [
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Grant.select(1)
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.from('information_schema.user_privileges')
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.where("PRIVILEGE_TYPE = 'SUPER'")
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.where("GRANTEE = CONCAT('\\'', REPLACE(CURRENT_USER(), '@', '\\'@\\''), '\\'')"),
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Grant.select(1)
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.from('information_schema.schema_privileges')
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.where("PRIVILEGE_TYPE = 'TRIGGER'")
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.where('TABLE_SCHEMA = ?', Gitlab::Database.database_name)
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.where("GRANTEE = CONCAT('\\'', REPLACE(CURRENT_USER(), '@', '\\'@\\''), '\\'')")
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]
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union = SQL::Union.new(queries).to_sql
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Grant.from("(#{union}) privs").any?
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end
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end
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end
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end
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end
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