Code refactoring

Author: lqmanh

postgrest_py/client.py

@@ -33,4 +33,4 @@ def schema(self, schema: str) -> Client:
         return self
 
     def fromTable(self, table: str) -> RequestBuilder:
-        return RequestBuilder(self.session, table)
+        return RequestBuilder(self.session, f"/{table}")

postgrest_py/request_builder.py

@@ -2,28 +2,32 @@
 
 
 class RequestBuilder:
-    def __init__(self, session: AsyncClient, table: str) -> None:
+    def __init__(self, session: AsyncClient, path: str) -> None:
         self.session = session
-        self.path = f"/{table}"
-        self.http_method = "GET"
+        self.path = path
         self.params = {}
         self.json = {}
+        self.http_method = "GET"
 
     def select(self, columns: str) -> RequestBuilder:
-        self.http_method = "GET"
         self.params["select"] = columns
+        self.http_method = "GET"
+        return self
 
     def insert(self, json: dict, *, upsert=False) -> RequestBuilder:
-        self.http_method = "POST"
         self.session.headers[
             "Prefer"
         ] = f"return=representation{',resolution=merge-duplicates' if upsert else ''}"
         self.json = json
+        self.http_method = "POST"
+        return self
 
     def update(self, json: dict) -> RequestBuilder:
-        self.http_method = "PATCH"
         self.session.headers["Prefer"] = "return=representation"
         self.json = json
+        self.http_method = "PATCH"
+        return self
 
     def delete(self) -> RequestBuilder:
         self.http_method = "DELETE"
+        return self