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1 | package DBIx::Class::DeploymentHandler::VersionHandler::ExplicitVersions; |
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2 | use Moose; |
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3 | use Carp 'croak'; |
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4 | |
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5 | with 'DBIx::Class::DeploymentHandler::HandlesVersioning'; |
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6 | |
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7 | has schema_version => ( |
8 | isa => 'Str', |
9 | is => 'ro', |
10 | required => 1, |
11 | ); |
12 | |
13 | has database_version => ( |
14 | isa => 'Str', |
15 | is => 'ro', |
16 | required => 1, |
17 | ); |
18 | |
19 | has to_version => ( # configuration |
20 | is => 'ro', |
21 | lazy_build => 1, # builder comes from another role... |
22 | # which is... probably not how we want it |
23 | ); |
24 | |
25 | sub _build_to_version { $_[0]->schema_version } |
26 | |
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27 | has ordered_versions => ( |
28 | is => 'ro', |
29 | isa => 'ArrayRef', |
30 | required => 1, |
31 | trigger => sub { |
32 | my $to_version = $_[0]->to_version; |
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33 | my $db_version = $_[0]->database_version; |
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34 | |
35 | croak 'to_version not in ordered_versions' |
36 | unless grep { $to_version eq $_ } @{ $_[1] }; |
37 | |
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38 | croak 'database_version not in ordered_versions' |
39 | unless grep { $db_version eq $_ } @{ $_[1] }; |
40 | |
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41 | for (@{ $_[1] }) { |
42 | return if $_ eq $db_version; |
43 | croak 'to_version is before database version in ordered_versions' |
44 | if $_ eq $to_version; |
45 | } |
46 | }, |
47 | ); |
48 | |
49 | has _version_idx => ( |
50 | is => 'rw', |
51 | isa => 'Int', |
52 | lazy_build => 1, |
53 | ); |
54 | |
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55 | sub _inc_version_idx { $_[0]->_version_idx($_[0]->_version_idx + 1 ) } |
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56 | |
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57 | sub _build__version_idx { |
58 | my $self = shift; |
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59 | my $start = $self->database_version; |
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60 | my $idx = 0; |
61 | for (@{$self->ordered_versions}) { |
62 | return $idx |
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63 | if $_ eq $self->database_version; |
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64 | $idx++; |
65 | } |
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66 | } |
67 | |
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68 | sub next_version_set { |
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69 | my $self = shift; |
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70 | return undef |
71 | if $self->ordered_versions->[$self->_version_idx] eq $self->to_version; |
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72 | |
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73 | # this should never get in infinite loops because we ensure |
74 | # that the database version is in the list in the version_idx |
75 | # builder |
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76 | my $next_idx = $self->_inc_version_idx; |
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77 | return [ |
78 | $self->ordered_versions->[$next_idx - 1], |
79 | $self->ordered_versions->[$next_idx ], |
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80 | ]; |
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81 | } |
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82 | |
83 | __PACKAGE__->meta->make_immutable; |
84 | |
85 | 1; |
86 | |
87 | __END__ |
88 | |
89 | vim: ts=2 sw=2 expandtab |