make prefix optional and update vector field args (#63)

This PR makes the `prefix` field optional and an empty string by
default, which mirrors the default because of the RediSearch API. It
also removes the vector field args for block size and initial cap as
these are not user friendly fields.

Author: tylerhutcherson

redisvl/cli/index.py

@@ -90,7 +90,7 @@ def delete(self, args: Namespace, drop=False):
         """Delete an index
 
         Usage:
-            redisvl index delete -i <index_name> | -s <schema_path>
+            rvl index delete -i <index_name> | -s <schema_path>
         """
         index = self._connect_to_index(args)
         index.delete(drop=drop)

redisvl/index.py

@@ -169,7 +169,7 @@ def _get_key(self, record: Dict[str, Any], key_field: Optional[str] = None) -> s
                 key = record[key_field]  # type: ignore
             except KeyError:
                 raise ValueError(f"Key field {key_field} not found in record {record}")
-        return f"{self._prefix}:{key}"
+        return f"{self._prefix}:{key}" if self._prefix else key
 
     @check_connected("_redis_conn")
     def info(self) -> Dict[str, Any]:

redisvl/schema.py

@@ -64,7 +64,6 @@ class BaseVectorField(BaseModel):
     algorithm: object = Field(...)
     datatype: str = Field(default="FLOAT32")
     distance_metric: str = Field(default="COSINE")
-    initial_cap: int = Field(default=20000)
 
     @validator("algorithm", "datatype", "distance_metric", pre=True, each_item=True)
     def uppercase_strings(cls, v):
@@ -73,7 +72,6 @@ def uppercase_strings(cls, v):
 
 class FlatVectorField(BaseVectorField):
     algorithm: object = Literal["FLAT"]
-    block_size: int = Field(default=1000)
 
     def as_field(self):
         return VectorField(
@@ -83,8 +81,6 @@ def as_field(self):
                 "TYPE": self.datatype,
                 "DIM": self.dims,
                 "DISTANCE_METRIC": self.distance_metric,
-                "INITIAL_CAP": self.initial_cap,
-                "BLOCK_SIZE": self.block_size,
             },
         )
 
@@ -104,7 +100,6 @@ def as_field(self):
                 "TYPE": self.datatype,
                 "DIM": self.dims,
                 "DISTANCE_METRIC": self.distance_metric,
-                "INITIAL_CAP": self.initial_cap,
                 "M": self.m,
                 "EF_CONSTRUCTION": self.ef_construction,
                 "EF_RUNTIME": self.ef_runtime,
@@ -115,7 +110,7 @@ def as_field(self):
 
 class IndexModel(BaseModel):
     name: str = Field(...)
-    prefix: str = Field(...)
+    prefix: Optional[str] = Field(default="")
     storage_type: Optional[str] = Field(default="hash")