Correct the SQLite schema for the exports table

CHANGELOG.markdown

@@ -6,6 +6,17 @@ but not every minor bugfix.
 
 The goatcounter.com service generally runs the latest master.
 
+2020-11-10, v1.4.2
+------------------
+
+- Add a "visitor counter" image you can add to your website to display the
+  number of visitors, similar to old-style counters back in the ’90s (#398).
+
+- Other than this, it's mostly contains a few minor bugfixes and the like. You
+  can see a list of changes in the git log:
+  https://github.com/zgoat/goatcounter/compare/v1.4.1...v1.4.2
+
+
 2020-09-04 v1.4.1
 -----------------
 

db/migrate/sqlite/2020-11-10-1-correct-exports.sql

@@ -0,0 +1,26 @@
+begin;
+	create table exports2 (
+		export_id         integer        primary key autoincrement,
+		site_id           integer        not null,
+		start_from_hit_id integer        not null,
+
+		path              varchar        not null,
+		created_at        timestamp      not null    check(created_at = strftime('%Y-%m-%d %H:%M:%S', created_at)),
+
+		finished_at       timestamp                  check(finished_at is null or finished_at = strftime('%Y-%m-%d %H:%M:%S', finished_at)),
+		last_hit_id       integer,
+		num_rows          integer,
+		size              varchar,
+		hash              varchar,
+		error             varchar,
+
+		foreign key (site_id) references sites(id) on delete restrict on update restrict
+	);
+	insert into exports2
+		select export_id, site_id, start_from_hit_id, path, created_at, finished_at, last_hit_id, num_rows, size, hash, error from exports;
+	drop table exports;
+	alter table exports2 rename to exports;
+	create index "exports#site_id#created_at" on exports(site_id, created_at);
+
+	insert into version values('2020-11-10-1-correct-exports');
+commit;

db/schema.sql

@@ -486,7 +486,7 @@ create table exports (
 	path              varchar        not null,
 	created_at        timestamp      not null    check(created_at = strftime('%Y-%m-%d %H:%M:%S', created_at)),
 
-	finished_at       timestamp                  check(finished_at is null or finished_at = strftime('%Y-%m-%d %H:%M:%S', created_at)),
+	finished_at       timestamp                  check(finished_at is null or finished_at = strftime('%Y-%m-%d %H:%M:%S', finished_at)),
 	last_hit_id       integer,
 	num_rows          integer,
 	size              varchar,

tpl/api.html

@@ -515,6 +515,8 @@ <h3 id="goatcounter.SiteSettings">goatcounter.SiteSettings <a class="permalink"
 			<p class="info"></p>
 			<h4>public <sup>boolean</sup></h4>
 <p></p>
+<h4>allow_counter <sup>boolean</sup></h4>
+<p></p>
 <h4>twenty_four_hours <sup>boolean</sup></h4>
 <p></p>
 <h4>sunday_starts_week <sup>boolean</sup></h4>

tpl/api.json

@@ -593,6 +593,9 @@
         "allow_admin": {
           "type": "boolean"
         },
+        "allow_counter": {
+          "type": "boolean"
+        },
         "campaigns": {
           "type": "array",
           "items": {