Fix duplicate loan_id error

At most one result should exist for each loan stored but not redeclaring
the 'estimate' variable within the seed loop caused the loan entries of
the first estimate to be copied onto the second, which caused an error
while seeding result entries.

components/estimates.vue

@@ -149,6 +149,7 @@ function summarize() {
 		    response.text().then(t => console.log(t))
 		}
 	}).then(result => {
+        console.log(result)
 		if (!result || !result.length) return // Exit if token is invalid or no fees are saved
 		console.log('done', result)
 	})

migrations/0_29092022_setup_tables.sql

@@ -178,7 +178,7 @@ CREATE TABLE fee_template (
 
 CREATE TABLE estimate_result (
 	id 				INT AUTO_INCREMENT,
-	loan_id 		INT NOT NULL,
+	loan_id 		INT UNIQUE NOT NULL,
 	loan_payment	INT NOT NULL,
 	total_monthly	INT NOT NULL,
 	total_fees	INT NOT NULL,

skouter.go

@@ -1619,6 +1619,44 @@ func getResults(db *sql.DB, e int, id int) ( []Result, error ) {
 	return results, nil
 }
 
+// Retrieve an estimate result with a specified loan id
+func getResult(db *sql.DB, loan int) ( Result, error ) {
+	var result Result
+	var query string
+	var err error
+
+	query = `SELECT
+	r.id,
+	loan_id,
+	loan_payment,
+	total_monthly,
+	total_fees,
+	total_credits,
+	cash_to_close
+	FROM estimate_result r
+	INNER JOIN loan
+	ON r.loan_id = loan.id
+	WHERE loan.Id = ?
+	`
+	row := db.QueryRow(query, loan)
+
+	err = row.Scan(
+			&result.Id,
+			&result.LoanId,
+			&result.LoanPayment,
+			&result.TotalMonthly,
+			&result.TotalFees,
+			&result.TotalCredits,
+			&result.CashToClose,
+			)
+
+	if err != nil {
+			return result, err
+        }
+
+	return result, nil
+}
+
 // Must have an estimate ID 'e', but not necessarily a loan id 'id'
 func getLoans(db *sql.DB, e int, id int) ( []Loan, error ) {
 	var loans []Loan
@@ -1680,6 +1718,11 @@ func getLoans(db *sql.DB, e int, id int) ( []Loan, error ) {
         }
 		loan.Fees = fees
 		
+		loan.Result, err = getResult(db, loan.Id)
+		if err != nil {
+			return loans, err
+        }
+
 		loan.Type, err = getLoanType(db, loan.Type.Id)
 		if err != nil {
 			return loans, err
@@ -2571,6 +2614,7 @@ func seedEstimates(db *sql.DB, users []User, ltypes []LoanType) []Estimate {
 	var err error
 
 	for i := 0; i < 15; i++ {
+		estimate = Estimate{}
 		estimate.User = users[gofakeit.Number(0, len(users) - 1)].Id
 		estimate.Borrower = Borrower{
 			Credit: gofakeit.Number(600, 800),