Feat: initial clearinghouse models

pems/clearinghouse/admin.py

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+from django.contrib import admin
+
+from pems.clearinghouse import models
+
+
+admin.site.register(models.DataCatalog)
+admin.site.register(models.CatalogEntry)

pems/clearinghouse/migrations/0001_initial.py

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+# Generated by Django 5.2.3 on 2025-07-17 04:55
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = []
+
+    operations = [
+        migrations.CreateModel(
+            name="DataCatalog",
+            fields=[
+                ("id", models.AutoField(primary_key=True, serialize=False)),
+                ("name", models.TextField(help_text="The name of this data catalog.")),
+                ("slug", models.SlugField(help_text="The unique slug for this data catalog.", unique=True)),
+            ],
+            options={
+                "verbose_name": "Data Catalog",
+                "verbose_name_plural": "Data Catalogs",
+            },
+        ),
+        migrations.CreateModel(
+            name="CatalogEntry",
+            fields=[
+                ("id", models.AutoField(primary_key=True, serialize=False)),
+                ("name", models.TextField(help_text="The name of this catalog entry.")),
+                ("slug", models.SlugField(help_text="The unique slug for this catalog entry.", unique=True)),
+                ("catalogs", models.ManyToManyField(to="clearinghouse.datacatalog")),
+            ],
+            options={
+                "verbose_name": "Catalog Entry",
+                "verbose_name_plural": "Catalog Entries",
+            },
+        ),
+    ]

pems/clearinghouse/models.py

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+from django.db import models
+
+
+class DataCatalog(models.Model):
+    """Defines a data catalog in the Clearinghouse."""
+
+    class Meta:
+        verbose_name = "Data Catalog"
+        verbose_name_plural = "Data Catalogs"
+
+    id = models.AutoField(primary_key=True)
+    name = models.TextField(help_text="The name of this data catalog.")
+    slug = models.SlugField(help_text="The unique slug for this data catalog.", unique=True)
+
+    def __str__(self):
+        return self.name
+
+
+class CatalogEntry(models.Model):
+    """Defines an entry in a data catalog."""
+
+    class Meta:
+        verbose_name = "Catalog Entry"
+        verbose_name_plural = "Catalog Entries"
+
+    id = models.AutoField(primary_key=True)
+    catalogs = models.ManyToManyField(DataCatalog)
+    name = models.TextField(help_text="The name of this catalog entry.")
+    slug = models.SlugField(help_text="The unique slug for this catalog entry.", unique=True)
+
+    def __str__(self):
+        return self.name

tests/pytest/pems/clearinghouse/test_models.py

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+import pytest
+
+from pems.clearinghouse import models
+
+
+@pytest.fixture
+def data_catalog():
+    return models.DataCatalog.objects.create(name="Data Catalog", slug="data-catalog")
+
+
+@pytest.fixture
+def catalog_entry(data_catalog):
+    data_catalog.catalogentry_set.create(name="Catalog Entry", slug="catalog-entry")
+    return data_catalog.catalogentry_set.first()
+
+
+@pytest.mark.django_db
+class TestDataCatalog:
+    def test_str(self, data_catalog):
+        assert str(data_catalog) == "Data Catalog"
+
+
+@pytest.mark.django_db
+class TestCatalogEntry:
+    def test_str(self, catalog_entry):
+        assert str(catalog_entry) == "Catalog Entry"