database insertions function properly from python script

db/Seed.js

@@ -20,7 +20,7 @@ async function main() {
     const createCartTable = `
         CREATE TABLE IF NOT EXISTS cart (
             id                  INT             PRIMARY KEY GENERATED ALWAYS AS IDENTITY NOT NULL,
-            appUserId           INT             REFERENCES users(id),
+            appUserId           INT             REFERENCES users(id)
         );
     `;
 
@@ -49,7 +49,7 @@ async function main() {
         CREATE TABLE IF NOT EXISTS category (
             id                  INT             PRIMARY KEY GENERATED ALWAYS AS IDENTITY NOT NULL,
             name                VARCHAR         NOT NULL,
-            description         VARCHAR         NOT NULL
+            description         VARCHAR
         );
     `;
 
@@ -58,10 +58,10 @@ async function main() {
         CREATE TABLE IF NOT EXISTS product (
             id                  INT             PRIMARY KEY GENERATED ALWAYS AS IDENTITY NOT NULL,
             name                VARCHAR         NOT NULL,
-            description         VARCHAR         NOT NULL,
+            description         VARCHAR,
             categoryId          INT             REFERENCES category(id),
             regionId            INT             REFERENCES region(id),
-            price               NUMERIC         NOT NULL
+            price               NUMERIC
         );
     `;
 
@@ -87,8 +87,8 @@ async function main() {
     let status;
 
     try {
-        await client.query("DROP SCHEMA public CASCADE; CREATE SCHEMA public;");
-
+        await client.query("DROP SCHEMA public CASCADE; CREATE SCHEMA public");
+        
         for (let q of allQueries) {
             await client.query(q);
         }
@@ -97,6 +97,10 @@ async function main() {
         status = "Database setup successful!";
     } catch(e) {
         status = e;
+    } finally {
+        if (status !== "Database setup successful!") {
+            throw new Error(status);
+        }
     }
 
     console.log(status);

db/util/import_csv.py

@@ -1,67 +0,0 @@
-from logging.config import IDENTIFIER
-import psycopg2
-from psycopg2 import sql
-import csv
-import os
-
-# read data from environment if present
-env_path = "../../.env"
-fd = os.open(env_path, os.O_RDONLY)
-n = 300
-
-file_data = os.read(fd, n)
-parsed_string = ""
-
-# convert each ASCII value to its corresponding character
-for c in file_data:
-    parsed_string = parsed_string + chr(c)
-
-start = parsed_string.find('postgres')
-end = parsed_string.find('EXPRESS')
-
-# receive conn string from env
-constring = parsed_string[start:end]
-os.close(fd)
-
-# connect to local database instance and open a cursor
-conn = psycopg2.connect("dbname=e-commerce-092122 user=mikayladobson")
-cur = conn.cursor()
-
-# read and print data from selection
-cur.execute("SELECT * FROM users;")
-for i in cur.fetchall():
-    print(i)
-
-# function to read from a given csv file into postgres
-def insert_file_contents(file_path, table_name, column_count):
-    with open(file_path, 'r') as f:
-        reader = csv.reader(f)
-        header_names = ""
-        first_row_accessed = False
-
-        for row in reader:
-            # get row values from first row of reader
-            if not first_row_accessed:
-                header_names = row
-                first_row_accessed = True
-                continue
-
-            # execute table insertion for each row of csv based on number of columns
-            if column_count == 1:
-                cur.execute(sql.SQL(
-                    "INSERT INTO {} (%s) VALUES (%s)").format(sql.Identifier(table_name)),
-                    [header_names, row]
-                )
-            elif column_count == 3:
-                cur.execute(sql.SQL("INSERT INTO {} ({}) VALUES (%s, %s, %s)".format(sql.Identifier(table_name), sql.Identifier(header_names[0])), row))
-            else:
-                raise
-
-    conn.commit()
-
-
-insert_file_contents("./categories.csv", "category", 1)
-
-cur.execute("SELECT * FROM category;")
-for i in cur.fetchall():
-    print(i)

db/util/main.py

@@ -1,9 +1,11 @@
 import psycopg2
+from psycopg2 import sql
+import csv
 import os
 
 # read data from environment if present
-path = "../../.env"
-fd = os.open(path, os.O_RDONLY)
+env_path = "../../.env"
+fd = os.open(env_path, os.O_RDONLY)
 n = 300
 
 file_data = os.read(fd, n)
@@ -18,4 +20,51 @@ end = parsed_string.find('EXPRESS')
 
 # receive conn string from env
 constring = parsed_string[start:end]
-os.close(fd)
+os.close(fd)
+
+# connect to local database instance and open a cursor
+conn = psycopg2.connect("dbname=e-commerce-092122 user=mikayladobson")
+cur = conn.cursor()
+
+# read and print data from selection
+cur.execute("SELECT * FROM users;")
+for i in cur.fetchall():
+    print(i)
+
+# function to read from a given csv file into postgres
+def insert_file_contents(file_path, table_name, column_count):
+    with open(file_path, 'r', encoding='utf-8-sig') as f:
+        reader = csv.reader(f)
+        header_names = ""
+        first_row_accessed = False
+
+        for row in reader:
+            # get row values from first row of reader
+            if not first_row_accessed:
+                header_names = [item for item in row]
+                first_row_accessed = True
+                continue
+
+            # execute table insertion for each row of csv based on number of columns
+            if column_count == 3:
+                cur.execute(sql.SQL("INSERT INTO {table} ({h1}, {h2}, {h3}) VALUES (%s, %s, %s)".format(
+                        table=table_name,
+                        h1=header_names[0],
+                        h2=header_names[1],
+                        h3=header_names[2]
+                    )),
+                    row
+                )
+            elif column_count == 1:
+                cur.execute(sql.SQL("INSERT INTO {table} ({field}) VALUES (%s)".format(table=table_name, field=header_names[0])), row)
+            else:
+                raise
+
+    conn.commit()
+
+
+insert_file_contents("./categories.csv", 'category', 1)
+insert_file_contents("./regions.csv", 'region', 1)
+insert_file_contents("./products.csv", 'product', 3)
+
+print("Database insertions executed successfully.")

db/util/products.csv

@@ -1,51 +1,51 @@
-id,name,regionId,categoryId
-1,Allspice - Whole,8,1
-2,Cocoa Powder,1,1
-3,Cardamom - Green,3,1
-4,Cardamom - Black,4,1
-5,Cinnamon,2,1
-6,Cloves,1,1
-7,Fenugreek Seed,4,1
-8,Lavender Flowers,3,2
-9,Nutmeg,8,1
-10,Star Anise,2,1
-11,Vanilla Bean - Madagascar,1,1
-12,Vanilla Bean - Mexico,5,1
-13,Vanilla Paste,8,1
-14,Ancho Chile,5,3
-15,Cayenne - African,1,3
-16,Cayenne - Indian,4,3
-17,Chipotle Chile,5,3
-18,Ghost Chile,4,3
-19,Guajillo Chile,5,3
-20,Paprika - Hungarian,3,3
-21,Paprika - Spain,3,3
-22,Piment d'Esplette,3,3
-23,Thai Chile,2,3
-24,Basil,1,2
-25,Bay Leaf - California,7,2
-26,Bay Leaf - Turkish,3,2
-27,Chives,7,2
-28,Dill Weed,7,2
-29,Fenugreek Leaf,4,2
-30,Herbes de Provence,3,2
-31,Lemongrass,2,2
-32,Marjoram,1,2
-33,Oregano - Mexican,5,2
-34,Oregano - Turkish,3,2
-35,Parsley,7,2
-36,Peppermint,7,2
-37,Rosemary,3,2
-38,Sage,3,2
-39,Tarragon,3,2
-40,Fleur de Sel,3,4
-41,Grains of Paradise,1,4
-42,Himalayan Pink Salt,2,4
-43,Long Pepper,2,4
-44,Maldon Flake Sea Salt,3,4
-45,Peppercorn - Black,4,4
-46,Peppercorn - Green,4,4
-47,Peppercorn - Pink,8,4
-48,Peppercorn - Red,2,4
-49,Peppercorn - White,2,4
-50,Pepper - Szechuan,2,4
+name,regionId,categoryId
+Allspice - Whole,8,1
+Cocoa Powder,1,1
+Cardamom - Green,3,1
+Cardamom - Black,4,1
+Cinnamon,2,1
+Cloves,1,1
+Fenugreek Seed,4,1
+Lavender Flowers,3,2
+Nutmeg,8,1
+Star Anise,2,1
+Vanilla Bean - Madagascar,1,1
+Vanilla Bean - Mexico,5,1
+Vanilla Paste,8,1
+Ancho Chile,5,3
+Cayenne - African,1,3
+Cayenne - Indian,4,3
+Chipotle Chile,5,3
+Ghost Chile,4,3
+Guajillo Chile,5,3
+Paprika - Hungarian,3,3
+Paprika - Spain,3,3
+Piment d'Esplette,3,3
+Thai Chile,2,3
+Basil,1,2
+Bay Leaf - California,7,2
+Bay Leaf - Turkish,3,2
+Chives,7,2
+Dill Weed,7,2
+Fenugreek Leaf,4,2
+Herbes de Provence,3,2
+Lemongrass,2,2
+Marjoram,1,2
+Oregano - Mexican,5,2
+Oregano - Turkish,3,2
+Parsley,7,2
+Peppermint,7,2
+Rosemary,3,2
+Sage,3,2
+Tarragon,3,2
+Fleur de Sel,3,4
+Grains of Paradise,1,4
+Himalayan Pink Salt,2,4
+Long Pepper,2,4
+Maldon Flake Sea Salt,3,4
+Peppercorn - Black,4,4
+Peppercorn - Green,4,4
+Peppercorn - Pink,8,4
+Peppercorn - Red,2,4
+Peppercorn - White,2,4
+Pepper - Szechuan,2,4

db/util/regions.csv

@@ -1,9 +1,9 @@
-id,name
-1,Africa
-2,Asia
-3,Europe
-4,India
-5,Latin America
-6,Middle East
-7,North America
-8,Carribean
+name
+Africa
+Asia
+Europe
+India
+Latin America
+Middle East
+North America
+Carribean