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One form per row in the admin, and buttons that don't trip its validation
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The catalogue screen had a form per control: 467 forms, 464 CSRF tokens, 317 KB of HTML for a page that
gets opened on a phone in a bakery. It is now one form per row with several submit buttons — the same
`name="do"` pattern the catering table editor already used — which is 89 forms and 206 KB, and less
markup to read.

Only `save` looks at the text boxes, so moving a row cannot save a half-typed name. The buttons that
ignore them carry `formnovalidate`, because the name box is `required` and a browser would otherwise
refuse to submit "move down" while that box was empty — a validation error about something the button
has nothing to do with.

Verified on the running container: 89 forms, move and photo-remove still land, and the seeded catalogue
comes back the same after a database reset.

Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>
This commit is contained in:
austin
2026-07-26 16:51:31 -05:00
co-authored by Claude Opus 5
parent 54710019d2
commit 4ac984b33d
4 changed files with 133 additions and 136 deletions
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src/main/java/com/itsthevine/web/AdminController.java
+59 -47
View File
@@ -58,14 +58,51 @@ public class AdminController {
}); });
} }
/**
* Everything you can do to one item, from one form.
*
* <p>One form per item rather than one per button: the page carries forty items, and a separate form
* for each control meant 467 forms and 464 CSRF tokens — 317 KB of HTML for a screen that is opened
* on a phone, in a bakery. {@code name="do"} says which button was pressed and its value carries the
* argument, exactly as the catering table editor does.
*
* <p>Only {@code save} looks at the name and category boxes. The other actions deliberately ignore
* them, so pressing "move down" halfway through retyping a name doesn't save the half-typed name.
*
* @param action {@code save}, {@code move:-1}, {@code move:1}, {@code delete}, or
* {@code photo:<key>:<-1|1|0>} — earlier, later, or remove
*/
@PostMapping("/items/{id}") @PostMapping("/items/{id}")
public String describe(@PathVariable Long id, public String item(@PathVariable Long id,
@RequestParam String name, @RequestParam(name = "do", defaultValue = "save") String action,
@RequestParam String category, @RequestParam(required = false) String name,
@RequestParam(required = false) String category,
RedirectAttributes flash) { RedirectAttributes flash) {
String[] parts = action.split(":");
return run(flash, () -> { return run(flash, () -> {
switch (parts[0]) {
case "save" -> {
catalogue.describeItem(id, name, category); catalogue.describeItem(id, name, category);
flash.addFlashAttribute("done", "Saved " + name.trim() + "."); flash.addFlashAttribute("done", "Saved " + name.trim() + ".");
}
case "move" -> catalogue.moveItem(id, Integer.parseInt(parts[1]));
case "delete" -> {
catalogue.removeItem(id);
flash.addFlashAttribute("done", "Removed from the products page.");
}
case "photo" -> {
// The key is the middle field; it can contain slashes and dots but never a colon.
String key = parts[1];
int move = Integer.parseInt(parts[2]);
if (move == 0) {
catalogue.removePhoto(id, key);
} else {
catalogue.movePhoto(id, key, move);
}
}
// A stale page, or a hand-edited form. Do nothing rather than guess.
default -> { }
}
}); });
} }
@@ -79,38 +116,6 @@ public class AdminController {
}); });
} }
/**
* @param move {@code -1} or {@code 1} to shuffle the photo along, {@code 0} to remove it. One
* endpoint for the three buttons under a photo, because they are the same edit — which
* photos, in which order — and the server is what decides the resulting list.
*/
@PostMapping("/items/{id}/photos/arrange")
public String arrangePhoto(@PathVariable Long id,
@RequestParam String key,
@RequestParam int move,
RedirectAttributes flash) {
return run(flash, () -> {
if (move == 0) {
catalogue.removePhoto(id, key);
} else {
catalogue.movePhoto(id, key, move);
}
});
}
@PostMapping("/items/{id}/move")
public String move(@PathVariable Long id, @RequestParam int by, RedirectAttributes flash) {
return run(flash, () -> catalogue.moveItem(id, by));
}
@PostMapping("/items/{id}/delete")
public String remove(@PathVariable Long id, RedirectAttributes flash) {
return run(flash, () -> {
catalogue.removeItem(id);
flash.addFlashAttribute("done", "Removed from the products page.");
});
}
// --- filters ------------------------------------------------------------- // --- filters -------------------------------------------------------------
@PostMapping("/categories") @PostMapping("/categories")
@@ -121,24 +126,31 @@ public class AdminController {
}); });
} }
/**
* Everything you can do to one filter, from one form — same shape as an item.
*
* @param action {@code save}, {@code move:-1}, {@code move:1} or {@code delete}
*/
@PostMapping("/categories/{id}") @PostMapping("/categories/{id}")
public String renameFilter(@PathVariable Long id, @RequestParam String name, RedirectAttributes flash) { public String filter(@PathVariable Long id,
@RequestParam(name = "do", defaultValue = "save") String action,
@RequestParam(required = false) String name,
RedirectAttributes flash) {
String[] parts = action.split(":");
return run(flash, () -> { return run(flash, () -> {
switch (parts[0]) {
case "save" -> {
catalogue.renameFilter(id, name); catalogue.renameFilter(id, name);
flash.addFlashAttribute("done", "Renamed to " + name.trim() + ", and everything filed under it moved too."); flash.addFlashAttribute("done",
}); "Renamed to " + name.trim() + ", and everything filed under it moved too.");
} }
case "move" -> catalogue.moveFilter(id, Integer.parseInt(parts[1]));
@PostMapping("/categories/{id}/move") case "delete" -> {
public String moveFilter(@PathVariable Long id, @RequestParam int by, RedirectAttributes flash) {
return run(flash, () -> catalogue.moveFilter(id, by));
}
@PostMapping("/categories/{id}/delete")
public String removeFilter(@PathVariable Long id, RedirectAttributes flash) {
return run(flash, () -> {
catalogue.removeFilter(id); catalogue.removeFilter(id);
flash.addFlashAttribute("done", "Category deleted."); flash.addFlashAttribute("done", "Category deleted.");
}
default -> { }
}
}); });
} }
src/main/resources/templates/admin/catalogue.html
+44 -61
View File
@@ -4,8 +4,18 @@
<body> <body>
<div th:fragment="content"> <div th:fragment="content">
<!--/* The filter buttons. Renaming one carries everything filed under it, which is why the rename is a <!--/*
form of its own rather than an inline edit that might get half-submitted. */--> One form per row, not one per button.
Every control in a row submits that row's form, and `name="do"` says which was pressed — `move:-1`,
`photo:<key>:0`, `delete`. Forty items with a form per control came to 467 forms and 464 CSRF tokens,
which is 317 KB of HTML for a screen that gets opened on a phone in a bakery; this is 89 forms.
Only `save` reads the text boxes, so moving a row never saves a half-typed name. Those buttons also
carry `formnovalidate`: the name box is `required`, and without it a browser would refuse to submit
"move down" while the box was empty — which is nothing to do with moving the row.
*/-->
<section class="card"> <section class="card">
<h2 class="card-heading">Categories</h2> <h2 class="card-heading">Categories</h2>
<p class="mt-1 text-sm text-bakery-600"> <p class="mt-1 text-sm text-bakery-600">
@@ -14,34 +24,26 @@
</p> </p>
<ul class="mt-3 divide-y divide-bakery-100"> <ul class="mt-3 divide-y divide-bakery-100">
<li th:each="filter, f : ${filters}" class="flex flex-wrap items-center gap-2 py-2"> <li th:each="filter, f : ${filters}">
<form method="post" th:action="@{/admin/categories/{id}(id=${filter.id})}"
class="flex flex-wrap items-center gap-2 py-2">
<div class="flex gap-1"> <div class="flex gap-1">
<form method="post" th:action="@{/admin/categories/{id}/move(id=${filter.id})}"> <button type="submit" name="do" value="move:-1" formnovalidate class="btn-icon" th:disabled="${f.first}"
<input type="hidden" name="by" value="-1">
<button type="submit" class="btn-icon" th:disabled="${f.first}"
th:aria-label="|Move ${filter.name} up|">&uarr;</button> th:aria-label="|Move ${filter.name} up|">&uarr;</button>
</form> <button type="submit" name="do" value="move:1" formnovalidate class="btn-icon" th:disabled="${f.last}"
<form method="post" th:action="@{/admin/categories/{id}/move(id=${filter.id})}">
<input type="hidden" name="by" value="1">
<button type="submit" class="btn-icon" th:disabled="${f.last}"
th:aria-label="|Move ${filter.name} down|">&darr;</button> th:aria-label="|Move ${filter.name} down|">&darr;</button>
</form>
</div> </div>
<form method="post" th:action="@{/admin/categories/{id}(id=${filter.id})}" <label class="flex-1 min-w-52">
class="flex flex-1 min-w-60 items-center gap-2">
<label class="flex-1">
<span class="sr-only" th:text="|Name of the ${filter.name} category|">Name</span> <span class="sr-only" th:text="|Name of the ${filter.name} category|">Name</span>
<input class="field" name="name" th:value="${filter.name}" required> <input class="field" name="name" th:value="${filter.name}" required>
</label> </label>
<button type="submit" class="btn-secondary">Rename</button> <button type="submit" name="do" value="save" class="btn-secondary">Rename</button>
</form>
<span class="text-sm text-bakery-500 whitespace-nowrap" <span class="text-sm text-bakery-500 whitespace-nowrap"
th:text="|${filter.used} item${filter.used == 1 ? '' : 's'}|">0 items</span> th:text="|${filter.used} item${filter.used == 1 ? '' : 's'}|">0 items</span>
<form method="post" th:action="@{/admin/categories/{id}/delete(id=${filter.id})}"> <button type="submit" name="do" value="delete" formnovalidate class="btn-danger" th:disabled="${filter.used > 0}"
<button type="submit" class="btn-danger" th:disabled="${filter.used > 0}"
th:title="${filter.used > 0} ? 'Move its items somewhere else first' : 'Delete'" th:title="${filter.used > 0} ? 'Move its items somewhere else first' : 'Delete'"
th:aria-label="|Delete the ${filter.name} category|">Delete</button> th:aria-label="|Delete the ${filter.name} category|">Delete</button>
</form> </form>
@@ -86,30 +88,22 @@
</form> </form>
</section> </section>
<!--/* The catalogue itself. One card per item, and every control on it is a form: there is no
client-side state here, so a reload is always the truth. */-->
<section> <section>
<h2 class="card-heading" th:text="|On the page (${#lists.size(items)})|">On the page</h2> <h2 class="card-heading" th:text="|On the page (${#lists.size(items)})|">On the page</h2>
<ul class="mt-3 space-y-3"> <ul class="mt-3 space-y-3">
<li th:each="item, i : ${items}" class="card"> <li th:each="item, i : ${items}" class="card">
<div class="flex flex-col gap-4 sm:flex-row sm:items-start"> <form method="post" th:action="@{/admin/items/{id}(id=${item.id})}"
class="flex flex-col gap-4 sm:flex-row sm:items-start">
<div class="flex sm:flex-col gap-1 sm:pt-1"> <div class="flex sm:flex-col gap-1 sm:pt-1">
<form method="post" th:action="@{/admin/items/{id}/move(id=${item.id})}"> <button type="submit" name="do" value="move:-1" formnovalidate class="btn-icon" th:disabled="${i.first}"
<input type="hidden" name="by" value="-1">
<button type="submit" class="btn-icon" th:disabled="${i.first}"
th:aria-label="|Move ${item.name} up|">&uarr;</button> th:aria-label="|Move ${item.name} up|">&uarr;</button>
</form> <button type="submit" name="do" value="move:1" formnovalidate class="btn-icon" th:disabled="${i.last}"
<form method="post" th:action="@{/admin/items/{id}/move(id=${item.id})}">
<input type="hidden" name="by" value="1">
<button type="submit" class="btn-icon" th:disabled="${i.last}"
th:aria-label="|Move ${item.name} down|">&darr;</button> th:aria-label="|Move ${item.name} down|">&darr;</button>
</form>
</div> </div>
<div class="flex-1 min-w-0 space-y-3"> <div class="flex-1 min-w-0 space-y-3">
<form method="post" th:action="@{/admin/items/{id}(id=${item.id})}" <div class="grid gap-2 sm:grid-cols-[1fr_12rem_auto]">
class="grid gap-2 sm:grid-cols-[1fr_12rem_auto]">
<label class="block"> <label class="block">
<span class="sr-only">Name</span> <span class="sr-only">Name</span>
<input class="field" name="name" th:value="${item.name}" required> <input class="field" name="name" th:value="${item.name}" required>
@@ -124,58 +118,47 @@
th:selected="${filter.name == item.category}">Cakes</option> th:selected="${filter.name == item.category}">Cakes</option>
</select> </select>
</label> </label>
<button type="submit" class="btn-secondary">Save</button> <button type="submit" name="do" value="save" class="btn-secondary">Save</button>
</form> </div>
<!--/* Photos, in the order the products page shows them: the first is the one the card <!--/* Photos, in the order the products page shows them: the first is the one the card leads
leads with. Left/right rather than a drag target, which is far easier to hit on a with. Left/right rather than a drag target, which is far easier to hit on a phone. */-->
phone. */-->
<div class="flex flex-wrap gap-3"> <div class="flex flex-wrap gap-3">
<figure th:each="photo, p : ${item.photos}" class="w-28"> <figure th:each="photo, p : ${item.photos}" class="w-28">
<img th:src="${photo.url}" alt="" loading="lazy" <img th:src="${photo.url}" alt="" loading="lazy"
class="w-28 h-28 rounded-md object-cover border border-bakery-200 bg-bakery-100"> class="w-28 h-28 rounded-md object-cover border border-bakery-200 bg-bakery-100">
<figcaption class="mt-1 flex items-center justify-between gap-1"> <figcaption class="mt-1 flex items-center justify-between gap-1">
<div class="flex gap-1"> <div class="flex gap-1">
<form method="post" th:action="@{/admin/items/{id}/photos/arrange(id=${item.id})}"> <button type="submit" name="do" th:value="|photo:${photo.key}:-1|" formnovalidate class="btn-icon"
<input type="hidden" name="key" th:value="${photo.key}"> th:disabled="${p.first}" aria-label="Move photo earlier">&larr;</button>
<input type="hidden" name="move" value="-1"> <button type="submit" name="do" th:value="|photo:${photo.key}:1|" formnovalidate class="btn-icon"
<button type="submit" class="btn-icon" th:disabled="${p.first}" th:disabled="${p.last}" aria-label="Move photo later">&rarr;</button>
aria-label="Move photo earlier">&larr;</button>
</form>
<form method="post" th:action="@{/admin/items/{id}/photos/arrange(id=${item.id})}">
<input type="hidden" name="key" th:value="${photo.key}">
<input type="hidden" name="move" value="1">
<button type="submit" class="btn-icon" th:disabled="${p.last}"
aria-label="Move photo later">&rarr;</button>
</form>
</div> </div>
<form method="post" th:action="@{/admin/items/{id}/photos/arrange(id=${item.id})}">
<input type="hidden" name="key" th:value="${photo.key}">
<input type="hidden" name="move" value="0">
<!--/* The server refuses to leave an item with no photos; saying so up front beats an <!--/* The server refuses to leave an item with no photos; saying so up front beats an
error message. */--> error message. */-->
<button type="submit" class="btn-icon" th:disabled="${#lists.size(item.photos) == 1}" <button type="submit" name="do" th:value="|photo:${photo.key}:0|" formnovalidate class="btn-icon"
th:disabled="${#lists.size(item.photos) == 1}"
th:title="${#lists.size(item.photos) == 1} ? 'An item needs at least one photo' : 'Remove photo'" th:title="${#lists.size(item.photos) == 1} ? 'An item needs at least one photo' : 'Remove photo'"
aria-label="Remove photo">&times;</button> aria-label="Remove photo">&times;</button>
</form>
</figcaption> </figcaption>
</figure> </figure>
</div> </div>
<div class="flex flex-wrap items-center gap-2"> <div class="flex flex-wrap items-center gap-2">
<button type="submit" name="do" value="delete" formnovalidate class="btn-danger ml-auto"
th:aria-label="|Remove ${item.name} from the products page|">Delete item</button>
</div>
</div>
</form>
<!--/* Its own form, because a file input needs a multipart encoding and the rest of the row
doesn't. */-->
<form method="post" th:action="@{/admin/items/{id}/photos(id=${item.id})}" <form method="post" th:action="@{/admin/items/{id}/photos(id=${item.id})}"
enctype="multipart/form-data" class="flex flex-wrap items-center gap-2"> enctype="multipart/form-data" class="mt-2 flex flex-wrap items-center gap-2 sm:pl-12">
<input type="file" name="photos" accept="image/*" multiple required <input type="file" name="photos" accept="image/*" multiple required
class="text-sm text-bakery-800 file:btn file:btn-secondary file:mr-3"> class="text-sm text-bakery-800 file:btn file:btn-secondary file:mr-3">
<button type="submit" class="btn-secondary">Add photos</button> <button type="submit" class="btn-secondary">Add photos</button>
</form> </form>
<form method="post" th:action="@{/admin/items/{id}/delete(id=${item.id})}" class="ml-auto">
<button type="submit" class="btn-danger"
th:aria-label="|Remove ${item.name} from the products page|">Delete</button>
</form>
</div>
</div>
</div>
</li> </li>
</ul> </ul>
src/test/java/com/itsthevine/web/AdminPagesTest.java
+3 -2
View File
@@ -94,6 +94,7 @@ class AdminPagesTest {
@Test @Test
void renamingAnItemLandsAndSaysSo() throws Exception { void renamingAnItemLandsAndSaysSo() throws Exception {
mvc.perform(post("/admin/items/1").with(user("morissa")).with(csrf()) mvc.perform(post("/admin/items/1").with(user("morissa")).with(csrf())
.param("do", "save")
.param("name", "76th Birthday Cake (chocolate)") .param("name", "76th Birthday Cake (chocolate)")
.param("category", "Cakes")) .param("category", "Cakes"))
.andExpect(status().is3xxRedirection()) .andExpect(status().is3xxRedirection())
@@ -107,7 +108,7 @@ class AdminPagesTest {
@Test @Test
void aRefusalComesBackAsASentenceTheEditorCanActOn() throws Exception { void aRefusalComesBackAsASentenceTheEditorCanActOn() throws Exception {
// Cookies has items filed under it, and deleting the button shouldn't decide what happens to them. // Cookies has items filed under it, and deleting the button shouldn't decide what happens to them.
mvc.perform(post("/admin/categories/1/delete").with(user("morissa")).with(csrf())) mvc.perform(post("/admin/categories/1").with(user("morissa")).with(csrf()).param("do", "delete"))
.andExpect(redirectedUrl("/admin")) .andExpect(redirectedUrl("/admin"))
.andExpect(flash().attribute("problem", containsString("still filed under Cookies"))); .andExpect(flash().attribute("problem", containsString("still filed under Cookies")));
} }
@@ -115,7 +116,7 @@ class AdminPagesTest {
@Test @Test
void movingAnItemUpFromTheTopIsNotAnError() throws Exception { void movingAnItemUpFromTheTopIsNotAnError() throws Exception {
// The button is disabled in the page, but a stale page could still post this. // The button is disabled in the page, but a stale page could still post this.
mvc.perform(post("/admin/items/1/move").with(user("morissa")).with(csrf()).param("by", "-1")) mvc.perform(post("/admin/items/1").with(user("morissa")).with(csrf()).param("do", "move:-1"))
.andExpect(redirectedUrl("/admin")) .andExpect(redirectedUrl("/admin"))
.andExpect(flash().attributeCount(0)); .andExpect(flash().attributeCount(0));
} }
src/test/java/com/itsthevine/web/AdminSecurityTest.java
+5 -4
View File
@@ -3,7 +3,6 @@ package com.itsthevine.web;
import static org.springframework.security.test.web.servlet.request.SecurityMockMvcRequestPostProcessors.csrf; import static org.springframework.security.test.web.servlet.request.SecurityMockMvcRequestPostProcessors.csrf;
import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get; import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post; import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.put;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status; import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.BeforeEach;
@@ -78,7 +77,8 @@ class AdminSecurityTest {
mvc.perform(get("/admin/catering/tables/1")).andExpect(status().isUnauthorized()); mvc.perform(get("/admin/catering/tables/1")).andExpect(status().isUnauthorized());
mvc.perform(post("/admin/items").with(csrf()).param("name", "Free cake").param("category", "Cakes")) mvc.perform(post("/admin/items").with(csrf()).param("name", "Free cake").param("category", "Cakes"))
.andExpect(status().isUnauthorized()); .andExpect(status().isUnauthorized());
mvc.perform(post("/admin/items/1/delete").with(csrf())).andExpect(status().isUnauthorized()); mvc.perform(post("/admin/items/1").with(csrf()).param("do", "delete"))
.andExpect(status().isUnauthorized());
mvc.perform(post("/admin/categories").with(csrf()).param("name", "x")) mvc.perform(post("/admin/categories").with(csrf()).param("name", "x"))
.andExpect(status().isUnauthorized()); .andExpect(status().isUnauthorized());
// The prices are the one thing on this site a stranger would most enjoy editing. // The prices are the one thing on this site a stranger would most enjoy editing.
@@ -113,8 +113,9 @@ class AdminSecurityTest {
@Test @Test
void theContactFormStillNeedsItsCsrfToken() throws Exception { void theContactFormStillNeedsItsCsrfToken() throws Exception {
// Enabling the security starter enables CSRF for the PUBLIC contact form too. Without the token // Enabling the security starter enables CSRF for the PUBLIC contact form too. Without a token it
// it 403s; the SPA reads the XSRF-TOKEN cookie and sends X-XSRF-TOKEN. // 403s. The page's own form carries a hidden field (Spring Security fills it in for any th:action
// form); this JSON endpoint needs the X-XSRF-TOKEN header from the cookie.
mvc.perform(post("/api/contact").contentType(MediaType.APPLICATION_JSON) mvc.perform(post("/api/contact").contentType(MediaType.APPLICATION_JSON)
.content("{\"name\":\"Ada\",\"email\":\"[email protected]\",\"message\":\"hi\"}")) .content("{\"name\":\"Ada\",\"email\":\"[email protected]\",\"message\":\"hi\"}"))
.andExpect(status().isForbidden()); .andExpect(status().isForbidden());