Support patterns relative to the current directory

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 - Added a registration system for custom formatter classes.
 - Fixed loading of missing attribute from disk for ORM methods.
+- Added support for file patterns relative to the current directory.
 
 # 0.5.1 (2019-11-14)
 

datafiles/mapper.py

@@ -57,6 +57,10 @@ def path(self) -> Optional[Path]:
         if not self._pattern:
             return None
 
+        path = Path(self._pattern.format(self=self._instance))
+        if path.is_absolute() or self._pattern.startswith('./'):
+            return path.resolve()
+
         cls = self._instance.__class__
         try:
             root = Path(inspect.getfile(cls)).parent
@@ -65,8 +69,7 @@ def path(self) -> Optional[Path]:
             log.log(level, f'Unable to determine module for {cls}')
             root = Path.cwd()
 
-        relpath = self._pattern.format(self=self._instance)
-        return (root / relpath).resolve()
+        return (root / path).resolve()
 
     @property
     def relpath(self) -> Path:

datafiles/tests/test_mapper.py

@@ -38,11 +38,19 @@ def describe_path():
         def is_none_when_no_pattern(expect, mapper):
             expect(mapper.path) == None
 
-        def is_absolute_based_on_the_file(expect, mapper):
+        def is_relative_to_file_by_default(expect, mapper):
             mapper._pattern = '../../tmp/sample.yml'
             root = Path(__file__).parents[2]
             expect(mapper.path) == root / 'tmp' / 'sample.yml'
 
+        def is_absolute_when_specified(expect, mapper):
+            mapper._pattern = '/private/tmp/sample.yml'
+            expect(mapper.path) == Path('/private/tmp/sample.yml')
+
+        def is_relative_to_cwd_when_specified(expect, mapper):
+            mapper._pattern = './foobar/sample.yml'
+            expect(mapper.path) == Path.cwd() / 'foobar' / 'sample.yml'
+
     def describe_relpath():
         def when_cwd_is_parent(expect, mapper):
             mapper._pattern = '../../tmp/sample.yml'

docs/api/model.md

@@ -56,20 +56,24 @@ Item("def")  # <=> items/def.yml
 ```
 
 Attributes included in the filename pattern are automatically excluded from the file contents.
-Filename patterns are relative to the file in which models are defined unless `<pattern>` is an absolute path.
+Filename patterns are relative to the file in which models are defined unless `<pattern>` is an absolute path or explicitly relative to the current directory:
+
+- Absolute: `/tmp/items/{self.name}.yaml`
+- Relative to model: `items/{self.name}.yaml`
+- Relative to current directory: `./items/{self.name}.yaml`
 
 <h3>Options</h3>
 
 The following options can be passed to the `@datafile()` decorator:
 
-| Name | Type | Description | Default
-| --- | --- | --- | --- |
-| `attrs` | `dict` | Attributes to synchronize mapped to `datafile.converters` classes for serialization. | `{}` <sup>1</sup> |
-| `manual` | `bool` | Synchronize object and file changes manually. | `False` |
-| `defaults` | `bool` | Include default values in files. | `False` |
-| `auto_load` | `bool` | Load automatically after saving.<br>If `manual=True` this option is ignored. | `True` |
-| `auto_save` | `bool` | Save automatically after loading.<br>If `manual=True` this option is ignored. | `True` |
-| `auto_attr` | `bool` | Automatically infer new attributes from the file. | `False` |
+| Name        | Type   | Description                                                                          | Default           |
+| ----------- | ------ | ------------------------------------------------------------------------------------ | ----------------- |
+| `attrs`     | `dict` | Attributes to synchronize mapped to `datafile.converters` classes for serialization. | `{}` <sup>1</sup> |
+| `manual`    | `bool` | Synchronize object and file changes manually.                                        | `False`           |
+| `defaults`  | `bool` | Include default values in files.                                                     | `False`           |
+| `auto_load` | `bool` | Load automatically after saving.<br>If `manual=True` this option is ignored.         | `True`            |
+| `auto_save` | `bool` | Save automatically after loading.<br>If `manual=True` this option is ignored.        | `True`            |
+| `auto_attr` | `bool` | Automatically infer new attributes from the file.                                    | `False`           |
 
 <sup>1</sup> _By default, synchronized attributes are inferred from the type annotations._
 

pyproject.toml

@@ -1,7 +1,7 @@
 [tool.poetry]
 
 name = "datafiles"
-version = "0.6b3"
+version = "0.6b4"
 description = "File-based ORM for dataclasses."
 
 license = "MIT"