How to Enable and View Logs in Supabase

1// Edge Function with structured logging for production debugging
2// supabase/functions/process-order/index.ts
3
4import { createClient } from 'npm:@supabase/supabase-js@2'
5
6const corsHeaders = {
7  'Access-Control-Allow-Origin': '*',
8  'Access-Control-Allow-Headers': 'authorization, x-client-info, apikey, content-type',
9}
10
11// Structured logger for consistent log format
12function log(level: 'info' | 'warn' | 'error', message: string, data?: Record<string, unknown>) {
13  const entry = {
14    level,
15    message,
16    timestamp: new Date().toISOString(),
17    ...data,
18  }
19  if (level === 'error') {
20    console.error(JSON.stringify(entry))
21  } else if (level === 'warn') {
22    console.warn(JSON.stringify(entry))
23  } else {
24    console.log(JSON.stringify(entry))
25  }
26}
27
28Deno.serve(async (req) => {
29  if (req.method === 'OPTIONS') {
30    return new Response('ok', { headers: corsHeaders })
31  }
32
33  const requestId = crypto.randomUUID()
34  log('info', 'Request received', { requestId, method: req.method })
35
36  try {
37    const supabase = createClient(
38      Deno.env.get('SUPABASE_URL')!,
39      Deno.env.get('SUPABASE_ANON_KEY')!,
40      { global: { headers: { Authorization: req.headers.get('Authorization')! } } }
41    )
42
43    const { data: { user } } = await supabase.auth.getUser()
44    if (!user) {
45      log('warn', 'Unauthorized request', { requestId })
46      return new Response(
47        JSON.stringify({ error: 'Unauthorized' }),
48        { status: 401, headers: { ...corsHeaders, 'Content-Type': 'application/json' } }
49      )
50    }
51
52    log('info', 'User authenticated', { requestId, userId: user.id })
53
54    const body = await req.json()
55    const { data, error } = await supabase
56      .from('orders')
57      .insert({ user_id: user.id, ...body })
58      .select()
59      .single()
60
61    if (error) {
62      log('error', 'Database insert failed', { requestId, error: error.message })
63      return new Response(
64        JSON.stringify({ error: error.message }),
65        { status: 500, headers: { ...corsHeaders, 'Content-Type': 'application/json' } }
66      )
67    }
68
69    log('info', 'Order created', { requestId, orderId: data.id })
70    return new Response(
71      JSON.stringify({ order: data }),
72      { status: 201, headers: { ...corsHeaders, 'Content-Type': 'application/json' } }
73    )
74  } catch (err) {
75    log('error', 'Unexpected error', { requestId, error: (err as Error).message })
76    return new Response(
77      JSON.stringify({ error: 'Internal server error' }),
78      { status: 500, headers: { ...corsHeaders, 'Content-Type': 'application/json' } }
79    )
80  }
81})