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package WebAPI::DBIC::Resource::ActiveModel::Role::DBIC; |
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$WebAPI::DBIC::Resource::ActiveModel::Role::DBIC::VERSION = '0.004001'; |
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use Carp qw(croak confess); |
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use Devel::Dwarn; |
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use JSON::MaybeXS qw(JSON); |
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use Moo::Role; |
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requires 'get_url_for_item_relationship'; |
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requires 'render_item_as_plain_hash'; |
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requires 'path_for_item'; |
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requires 'add_params_to_url'; |
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requires 'prefetch'; |
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requires 'type_namer'; |
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sub activemodel_type { |
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my ($self) = @_; |
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return $self->type_namer->type_name_for_resultset($self->set); |
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} |
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sub render_activemodel_prefetch_rel { |
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my ($self, $set, $parent_relname, $relname, $rel_sets, $item_edit_rel_hooks) = @_; |
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my $parent_class = $set->result_class; |
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my $child_class = $parent_class->relationship_info($relname)->{class} || die "panic"; |
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my @idcolumns = $child_class->unique_constraint_columns('primary'); # XXX wrong |
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if (@idcolumns > 1) { # eg many-to-many that doesn't have a separate id |
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warn "Child result class $child_class has multiple keys (@idcolumns) so relations like $relname won't have links generated.\n" |
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unless our $warn_once->{"$child_class $relname"}++; |
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return; |
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} |
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my $rel_typename = $self->type_namer->type_name_for_result_class($child_class); |
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return if $item_edit_rel_hooks->{$parent_relname}->{$relname}; |
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$item_edit_rel_hooks->{$parent_relname}->{$relname} = sub { |
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my ($activemodel_obj, $row) = @_; |
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48
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my $subitem = $row->$relname(); |
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50
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my $rel_set = $rel_sets->{$rel_typename} ||= {}; |
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52
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my $rel_ids; |
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if (not defined $subitem) { |
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54
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$rel_ids = undef; |
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} |
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elsif ($subitem->isa('DBIx::Class::ResultSet')) { # one-to-many rel |
57
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$rel_ids = []; |
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while (my $subrow = $subitem->next) { |
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my $id = $subrow->id; |
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push @$rel_ids, $id; |
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my $rel_object = $self->render_row_as_activemodel_resource_object($subrow, undef, sub { |
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my ($activemodel_obj, $row) = @_; |
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$_->($activemodel_obj, $row) for values %{$item_edit_rel_hooks->{$relname}}; |
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64
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}); |
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# In case this object has been pulled in before, do what we can |
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# to preserve the existing keys and add to them as appropriate. |
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$rel_set->{$id} //= {}; |
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$rel_set->{$id} = { %{$rel_object}, %{$rel_set->{$id}} }; |
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0
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69
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} |
70
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} |
71
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elsif ($subitem->isa('DBIx::Class::Row')) { # one-to-one rel |
72
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$rel_ids = $subitem->id; |
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my $rel_object = $self->render_row_as_activemodel_resource_object($subitem, undef, sub { |
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my ($activemodel_obj, $row) = @_; |
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$_->($activemodel_obj, $row) for values %{$item_edit_rel_hooks->{$relname}}; |
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76
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}); |
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# In case this object has been pulled in before, do what we can |
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# to preserve the existing keys and add to them as appropriate. |
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$rel_set->{$subitem->id} //= {}; |
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$rel_set->{$subitem->id} = { %{$rel_object}, %{$rel_set->{$subitem->id}} }; |
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0
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81
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} |
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else { |
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die "panic: don't know how to handle $row $relname value $subitem"; |
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} |
85
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86
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# XXX We could either create a 'relationship_namer' similar to the 'type_namer', |
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# or create a mechanism to facilitate adapter/serializer classes. |
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# Per http://emberjs.com/api/data/classes/DS.ActiveModelAdapter.html: |
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# This should use the relationship name, singularized, and suffixed with |
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# '_id' for belongsTo relationships or '_ids' for hasMany relationships. |
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if ($rel_ids) { |
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my $suffix = ref($rel_ids) ? '_ids' : '_id'; |
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my $relname_id = Lingua::EN::Inflect::Number::to_S($relname).$suffix; |
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$activemodel_obj->{$relname_id} = $rel_ids; |
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} |
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} |
97
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0
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} |
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99
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100
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sub render_activemodel_response { # return top-level document hashref |
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0
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my ($self) = @_; |
102
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103
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0
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my $set = $self->set; |
104
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my $prefetch = $self->prefetch; |
105
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106
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0
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my $rel_sets = {}; |
107
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my $item_edit_rel_hooks = {}; |
108
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109
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$self->traverse_prefetch($set, [ 'top' ], $prefetch, sub { |
110
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0
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0
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my ($self, $set, $parent_rel, $prefetch) = @_; |
111
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#warn "$self: $set, $parent_rel, $prefetch\n"; |
112
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0
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$self->render_activemodel_prefetch_rel($set, $parent_rel->[-1], $prefetch, $rel_sets, $item_edit_rel_hooks) |
113
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0
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}); |
114
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115
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0
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my $result_class = $set->result_class; |
116
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my $set_data = $self->render_set_as_array_of_activemodel_resource_objects($set, undef, sub { |
117
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0
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0
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my ($activemodel_obj, $row) = @_; |
118
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0
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$_->($activemodel_obj, $row) for values %{$item_edit_rel_hooks->{'top'}}; |
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119
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0
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}); |
120
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121
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# construct top document to return |
122
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0
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0
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my $top_set_key = ($self->param('distinct')) ? 'data' : $self->activemodel_type; |
123
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my $top_doc = { # http://jsonapi.org/format/#document-structure-top-level |
124
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$top_set_key => $set_data, |
125
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}; |
126
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127
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0
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if (keys %$rel_sets) { |
128
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while ( my ($k, $v) = each %$rel_sets) { |
129
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# sort just for test stability, |
130
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$top_doc->{$k} = [ @{$v}{ sort keys %$v } ]; |
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131
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} |
132
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} |
133
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134
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my $total_items; |
135
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if (($self->param('with')||'') =~ /count/) { # XXX |
136
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$total_items = $set->pager->total_entries; |
137
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$top_doc->{meta}{count} = $total_items; # XXX detail not in spec |
138
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} |
139
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140
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0
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return $top_doc; |
141
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} |
142
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143
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144
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145
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sub render_item_as_activemodel_hash { |
146
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my ($self, $item) = @_; |
147
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148
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my $data = $self->render_item_as_plain_hash($item); |
149
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150
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return $data; |
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} |
152
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153
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154
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sub render_set_as_array_of_activemodel_resource_objects { |
155
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0
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my ($self, $set, $render_method, $edit_hook) = @_; |
156
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157
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my @activemodel_objs; |
158
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while (my $row = $set->next) { |
159
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push @activemodel_objs, $self->render_row_as_activemodel_resource_object($row, $render_method, $edit_hook); |
160
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} |
161
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162
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return \@activemodel_objs; |
163
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} |
164
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165
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sub render_row_as_activemodel_resource_object { |
166
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my ($self, $row, $render_method, $edit_hook) = @_; |
167
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$render_method ||= 'render_item_as_activemodel_hash'; |
168
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169
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my $obj = $self->$render_method($row); |
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$edit_hook->($obj, $row) if $edit_hook; |
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172
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return $obj; |
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} |
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175
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178
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179
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1; |
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181
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__END__ |
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183
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=pod |
184
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185
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=encoding UTF-8 |
186
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187
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=head1 NAME |
188
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189
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WebAPI::DBIC::Resource::ActiveModel::Role::DBIC |
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191
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=head1 VERSION |
192
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193
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version 0.004001 |
194
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195
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=head1 NAME |
196
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197
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WebAPI::DBIC::Resource::ActiveModel::Role::DBIC - a role with core methods for DBIx::Class resources |
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199
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=head1 AUTHOR |
200
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201
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Tim Bunce <Tim.Bunce@pobox.com> |
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=head1 COPYRIGHT AND LICENSE |
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This software is copyright (c) 2015 by Tim Bunce. |
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This is free software; you can redistribute it and/or modify it under |
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the same terms as the Perl 5 programming language system itself. |
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=cut |