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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,98 @@ | ||
| require "rubygems" | ||
| require "dm-core" | ||
| require "dm-migrations" | ||
|
|
||
| DataMapper::Logger.new($stdout, :debug) | ||
| DataMapper.setup(:default, "sqlite3::memory:") | ||
|
|
||
| class Camera | ||
| include DataMapper::Resource | ||
|
|
||
| property :id, Serial | ||
| property :name, String | ||
|
|
||
| has n, :fields, 'CameraProperty' | ||
| has n, :lens | ||
| end | ||
|
|
||
| class CameraProperty | ||
| include DataMapper::Resource | ||
|
|
||
| property :id, Serial | ||
| property :name, String | ||
|
|
||
| belongs_to :camera | ||
| end | ||
|
|
||
| class Len | ||
| include DataMapper::Resource | ||
|
|
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| property :id, Serial | ||
| property :name, String | ||
|
|
||
| belongs_to :camera | ||
| has n, :fields, 'LenProperty' | ||
| end | ||
|
|
||
| class LenProperty | ||
| include DataMapper::Resource | ||
|
|
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| property :id, Serial | ||
| property :name, String | ||
|
|
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| belongs_to :len | ||
| end | ||
|
|
||
| DataMapper.auto_migrate! | ||
|
|
||
| c = Camera.new(:name => 'Model A') | ||
| c.fields.new(:name => 'Height') | ||
| c.fields.new(:name => 'Width') | ||
| c.save | ||
|
|
||
| l = Len.new(:name => '35mm') | ||
| l.camera = Camera.get(1) | ||
| l.fields.new(:name => 'focal') | ||
| l.save | ||
|
|
||
| puts Camera.get(1).fields.all.length | ||
| puts Len.get(1).fields.all.length | ||
| puts Camera.get(1).lens.first.fields.length | ||
|
|
||
| __END__ | ||
|
|
||
| ree-1.8.7-2010.01 mungo:dm-snippets snusnu$ bundle exec ruby 1208.rb | ||
| ~ (0.000044) SELECT sqlite_version(*) | ||
| ~ (0.000058) DROP TABLE IF EXISTS "cameras" | ||
| ~ (0.000009) PRAGMA table_info("cameras") | ||
| ~ (0.000261) CREATE TABLE "cameras" ("id" INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, "name" VARCHAR(50)) | ||
| ~ (0.000011) DROP TABLE IF EXISTS "camera_properties" | ||
| ~ (0.000007) PRAGMA table_info("camera_properties") | ||
| ~ (0.000108) CREATE TABLE "camera_properties" ("id" INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, "name" VARCHAR(50), "camera_id" INTEGER NOT NULL) | ||
| ~ (0.000092) CREATE INDEX "index_camera_properties_camera" ON "camera_properties" ("camera_id") | ||
| ~ (0.000013) DROP TABLE IF EXISTS "lens" | ||
| ~ (0.000007) PRAGMA table_info("lens") | ||
| ~ (0.000119) CREATE TABLE "lens" ("id" INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, "name" VARCHAR(50), "camera_id" INTEGER NOT NULL) | ||
| ~ (0.000087) CREATE INDEX "index_lens_camera" ON "lens" ("camera_id") | ||
| ~ (0.000010) DROP TABLE IF EXISTS "len_properties" | ||
| ~ (0.000013) PRAGMA table_info("len_properties") | ||
| ~ (0.000108) CREATE TABLE "len_properties" ("id" INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, "name" VARCHAR(50), "len_id" INTEGER NOT NULL) | ||
| ~ (0.000079) CREATE INDEX "index_len_properties_len" ON "len_properties" ("len_id") | ||
| ~ (0.000045) INSERT INTO "cameras" ("name") VALUES ('Model A') | ||
| ~ (0.000048) INSERT INTO "camera_properties" ("name", "camera_id") VALUES ('Height', 1) | ||
| ~ (0.000049) INSERT INTO "camera_properties" ("name", "camera_id") VALUES ('Width', 1) | ||
| ~ (0.000035) SELECT "id", "name" FROM "cameras" WHERE "id" = 1 ORDER BY "id" LIMIT 1 | ||
| /Users/snusnu/.rvm/gems/ree-1.8.7-2010.01/bundler/gems/dm-core-37b4bd22b9e3842977cf83d32baba459607e900a-master/lib/dm-core/resource.rb:639:in `collection': stack level too deep (SystemStackError) | ||
| from /Users/snusnu/.rvm/gems/ree-1.8.7-2010.01/bundler/gems/dm-core-37b4bd22b9e3842977cf83d32baba459607e900a-master/lib/dm-core/associations/one_to_many.rb:94:in `lazy_load' | ||
| from /Users/snusnu/.rvm/gems/ree-1.8.7-2010.01/bundler/gems/dm-core-37b4bd22b9e3842977cf83d32baba459607e900a-master/lib/dm-core/resource/state/persisted.rb:23:in `lazy_load' | ||
| from /Users/snusnu/.rvm/gems/ree-1.8.7-2010.01/bundler/gems/dm-core-37b4bd22b9e3842977cf83d32baba459607e900a-master/lib/dm-core/resource/state/persisted.rb:8:in `get' | ||
| from /Users/snusnu/.rvm/gems/ree-1.8.7-2010.01/bundler/gems/dm-core-37b4bd22b9e3842977cf83d32baba459607e900a-master/lib/dm-core/model/relationship.rb:344:in `fields' | ||
| from /Users/snusnu/.rvm/gems/ree-1.8.7-2010.01/bundler/gems/dm-core-37b4bd22b9e3842977cf83d32baba459607e900a-master/lib/dm-core/resource.rb:675:in `query' | ||
| from /Users/snusnu/.rvm/gems/ree-1.8.7-2010.01/bundler/gems/dm-core-37b4bd22b9e3842977cf83d32baba459607e900a-master/lib/dm-core/resource.rb:665:in `collection_for_self' | ||
| from /Users/snusnu/.rvm/gems/ree-1.8.7-2010.01/bundler/gems/dm-core-37b4bd22b9e3842977cf83d32baba459607e900a-master/lib/dm-core/resource.rb:640:in `collection' | ||
| from /Users/snusnu/.rvm/gems/ree-1.8.7-2010.01/bundler/gems/dm-core-37b4bd22b9e3842977cf83d32baba459607e900a-master/lib/dm-core/associations/one_to_many.rb:94:in `lazy_load' | ||
| ... 7847 levels... | ||
| from /Users/snusnu/.rvm/gems/ree-1.8.7-2010.01/bundler/gems/dm-core-37b4bd22b9e3842977cf83d32baba459607e900a-master/lib/dm-core/resource/state.rb:13:in `get' | ||
| from /Users/snusnu/.rvm/gems/ree-1.8.7-2010.01/bundler/gems/dm-core-37b4bd22b9e3842977cf83d32baba459607e900a-master/lib/dm-core/resource/state/transient.rb:9:in `get' | ||
| from /Users/snusnu/.rvm/gems/ree-1.8.7-2010.01/bundler/gems/dm-core-37b4bd22b9e3842977cf83d32baba459607e900a-master/lib/dm-core/model/relationship.rb:365:in `camera=' | ||
| from 1208.rb:54 |