[BUGFIX] Fetch dataset setting when iterate client.datasets (#5753)

# Description
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Please also include relevant motivation and context. List any
dependencies that are required for this change. -->

Closes #5718

**Type of change**
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PR according to the type of change -->

- Bug fix (non-breaking change which fixes an issue)

**How Has This Been Tested**
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**Checklist**
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- I added relevant documentation
- I followed the style guidelines of this project
- I did a self-review of my code
- I made corresponding changes to the documentation
- I confirm My changes generate no new warnings
- I have added tests that prove my fix is effective or that my feature
works
- I have added relevant notes to the CHANGELOG.md file (See
https://keepachangelog.com/)

Author: frascuchon

argilla/CHANGELOG.md

@@ -16,6 +16,10 @@ These are the section headers that we use:
 
 ## [Unreleased]()
 
+### Fixed
+
+- Fixed error when iterating over datasets and settings are not properly loaded. ([#5753](https://github.com/argilla-io/argilla/pull/5753))
+
 ## [2.5.0](https://github.com/argilla-io/argilla/compare/v2.4.0...v2.5.0)
 
 ### Added

argilla/src/argilla/client.py

@@ -312,7 +312,9 @@ class Datasets(Sequence["Dataset"], ResourceHTMLReprMixin):
     """A collection of datasets. It can be used to create a new dataset or to get an existing one."""
 
     class _Iterator(GenericIterator["Dataset"]):
-        pass
+        def __next__(self):
+            dataset = super().__next__()
+            return dataset.get()
 
     def __init__(self, client: "Argilla") -> None:
         self._client = client
@@ -366,7 +368,7 @@ def __getitem__(self, index: slice) -> Sequence["Dataset"]: ...
 
     def __getitem__(self, index) -> "Dataset":
         model = self._api.list()[index]
-        return self._from_model(model)
+        return self._from_model(model).get()
 
     def __len__(self) -> int:
         return len(self._api.list())

argilla/tests/integration/test_listing_datasets.py

@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from argilla import Argilla, Dataset, Settings, TextField, TextQuestion, Workspace
+from argilla import Argilla, Dataset, Settings, TextField, TextQuestion, Workspace, TaskDistribution
 
 
 class TestDatasetsList:
@@ -33,3 +33,28 @@ def test_list_datasets(self, client: Argilla):
         for ds in datasets:
             if ds.name == "test_dataset":
                 assert ds == dataset, "The dataset was not loaded properly"
+
+    def test_list_dataset_with_custom_task_distribution(self, client: Argilla, workspace: Workspace):
+        dataset = Dataset(
+            name="test_dataset",
+            workspace=workspace.name,
+            settings=Settings(
+                fields=[TextField(name="text")],
+                questions=[TextQuestion(name="text_question")],
+                distribution=TaskDistribution(min_submitted=4),
+            ),
+            client=client,
+        )
+        dataset.create()
+        datasets = client.datasets
+        assert len(datasets) > 0, "No datasets were found"
+
+        dataset_idx = 0
+        for idx, ds in enumerate(datasets):
+            if ds.id == dataset.id:
+                dataset_idx = idx
+                assert ds.settings.distribution.min_submitted == 4, "The dataset was not loaded properly"
+                break
+
+        ds = client.datasets[dataset_idx]
+        assert ds.settings.distribution.min_submitted == 4, "The dataset was not loaded properly"