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6 DBIx::Class::Schema::Loader::Manual::UpgradingFromV4 - Important
7 Information Related to Upgrading from Version 0.04006
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10 • add_column
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12 The new Loader detects much more information about columns and sets
13 flags like "is_auto_increment" that it didn't set before.
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15 • RelBuilder
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17 The new RelBuilder will give you nicer accessor names for
18 relationships, so you will no longer have conflicts between a
19 foreign key column and the relationship accessor itself (if the FK
20 is named "_id".)
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22 It will also more correctly infer the relationship type, e.g. some
23 relationships that were previously detected as a "has_many" will
24 now be a "might_have" (when it detects a unique constraint on the
25 foreign key column.)
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27 Also "cascade_delete" and "cascade_copy" are turned off for by
28 default for "has_many" and "might_have" relationships, while
29 "belongs_to" relationships are created with "on_delete =>
30 'CASCADE'" and "on_update => 'CASCADE'" by default. This is
31 overridable via relationship_attrs.
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33 • moniker_map
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35 Table names are now singularized when determining the "Result"
36 class names. So the table "user_roles" would have become
37 "UserRoles" in 0.04006 but now becomes "UserRole" instead.
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39 • use_namespaces
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41 Now defaults to on. See "use_namespaces" in
42 DBIx::Class::Schema::Loader::Base and "load_namespaces" in
43 DBIx::Class::Schema.
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45 • Support for more databases
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47 We now support Microsoft SQL Server and Sybase, and there are also
48 many improvements to the other backends.
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51 In backward compatibility mode, the Loader will use the old
52 relationship names and types, will not singularize monikers for tables,
53 and "use_namespaces" will be off.
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55 To control this behavior see "naming" in
56 DBIx::Class::Schema::Loader::Base and "use_namespaces" in
57 DBIx::Class::Schema::Loader::Base.
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59 Static Schemas
60 When reading a "Schema.pm" from a static schema generated with an 0.04
61 version of Loader, backward compatibility mode will default to on,
62 unless overridden with the "naming" and/or "use_namespaces" attributes.
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64 Dynamic Schemas
65 Dynamic schemas will always by default use 0.04006 mode and have
66 "use_namespaces" off.
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68 To upgrade a dynamic schema, set the "naming" and "use_namespaces"
69 attributes (which is proxied to the loader) in your "Schema.pm":
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71 __PACKAGE__->naming('current');
72 __PACKAGE__->use_namespaces(1);
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75 See "AUTHORS" in DBIx::Class::Schema::Loader.
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78 This library is free software; you can redistribute it and/or modify it
79 under the same terms as Perl itself.
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83perl v5.32.1 DBIx::Class2:0:2S1c-h0e1m-a2:7:Loader::Manual::UpgradingFromV4(3)