fix: text in numeric column

backend/src/migrations/versions/4968a333a100_add_separate_depth_fields.py

@@ -10,21 +10,41 @@ import sqlalchemy as sa
 
 
 # revision identifiers, used by Alembic.
-revision = '4968a333a100'
-down_revision = 'b76b7f791b3b'
+revision = "4968a333a100"
+down_revision = "b76b7f791b3b"
 branch_labels = None
 depends_on = None
 
 
 def upgrade() -> None:
     # ### commands auto generated by Alembic ###
-    op.add_column('geodata', sa.Column('depth_min', sa.Float(), sa.Computed("SPLIT_PART(depth,'-',1)", ), nullable=True))
-    op.add_column('geodata', sa.Column('depth_max', sa.Float(), sa.Computed("SPLIT_PART(depth,'-',2)", ), nullable=True))
+    op.add_column(
+        "geodata",
+        sa.Column(
+            "depth_min",
+            sa.Float(),
+            sa.Computed(
+                "CAST(SPLIT_PART(depth,'-',1) AS DOUBLE PRECISION)",
+            ),
+            nullable=True,
+        ),
+    )
+    op.add_column(
+        "geodata",
+        sa.Column(
+            "depth_max",
+            sa.Float(),
+            sa.Computed(
+                "CAST(SPLIT_PART(depth,'-',1) AS DOUBLE PRECISION)",
+            ),
+            nullable=True,
+        ),
+    )
     # ### end Alembic commands ###
 
 
 def downgrade() -> None:
     # ### commands auto generated by Alembic ###
-    op.drop_column('geodata', 'depth_max')
-    op.drop_column('geodata', 'depth_min')
+    op.drop_column("geodata", "depth_max")
+    op.drop_column("geodata", "depth_min")
     # ### end Alembic commands ###

backend/src/models.py

@@ -48,8 +48,12 @@ class ItemCreate(ItemBase):
 
 
 class Item(ItemBase):
-    depth_min = Column(Float, Computed("SPLIT_PART(depth,'-',1)"))
-    depth_max = Column(Float, Computed("SPLIT_PART(depth,'-',2)"))
+    depth_min = Column(
+        Float, Computed("CAST(SPLIT_PART(depth,'-',1) AS DOUBLE PRECISION)")
+    )
+    depth_max = Column(
+        Float, Computed("CAST(SPLIT_PART(depth,'-',2)) AS DOUBLE PRECISION")
+    )
 
     geodata_search_ts = Column(
         TSVECTOR,