class Bmg::Sequel::TypeInference
Attributes
sequel_db[R]
Public Class Methods
new(sequel_db)
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# File lib/bmg/sequel/type_inference.rb, line 5 def initialize(sequel_db) @sequel_db = sequel_db end
Public Instance Methods
attrlist(name)
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# File lib/bmg/sequel/type_inference.rb, line 24 def attrlist(name) sequel_db.schema(name).map{|(k,v)| k } end
call(name)
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# File lib/bmg/sequel/type_inference.rb, line 10 def call(name) if type = sequel_db.bmg_schema_cache[name] type else type = Type.new .with_attrlist(attrlist(name)) .with_keys(keys(name)) ::Sequel.synchronize do sequel_db.bmg_schema_cache[name] = type end if sequel_db.cache_schema type end end
keys(name)
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# File lib/bmg/sequel/type_inference.rb, line 28 def keys(name) # take the indexes indexes = sequel_db .indexes(name) .values .select{|i| i[:unique] == true } .map{|i| i[:columns] } .sort{|a1, a2| a1.size <=> a2.size } # take single keys as well key = sequel_db .schema(name) .select{|(colname, colinfo)| colinfo[:primary_key] } .map(&:first) indexes.unshift(key) unless key.empty? indexes end