LykosAI/StabilityMatrix · error · InvalidOperationException

CivArchive detail page was missing model data

Error message

CivArchive detail page was missing model data

What it means

GetModelDetailsAsync throws InvalidOperationException when pageProps exists but pageProps.Model is null — the detail page data loaded but carries no model object. This happens after redirect handling when the final payload still lacks the model.

Solutions

1. Confirm the model still exists by opening its URL in a browser
2. Update CivArchiveDetailPageResponse mapping if the model key changed
3. Treat as entity-not-found and remove/stale-mark the local model
4. Check the self-redirect guard logic if a redirect loop was involved

Example fix

// before
var model = pageProps.Model ?? throw new InvalidOperationException("CivArchive detail page was missing model data");
// after
if (pageProps.Model is null) throw new InvalidOperationException($"CivArchive model not found: {relativeUrl}");

var resp = await GetNextDataAsync<CivArchiveDetailPageResponse>(path, ct);
bool modelPresent = resp?.PageProps?.Model is not null;

bool HasModel(CivArchiveDetailPageResponse r) => r?.PageProps?.Model is not null;

try { return await api.GetModelDetailsAsync(url); }
catch (InvalidOperationException) { /* treat as not-found */ return null; }

When it happens

Trigger: Calling GetModelDetailsAsync for a model whose page renders but whose __NEXT_DATA__ has pageProps without a model (e.g. soft-deleted model, suspended content, schema change moving model under a new key).

Common situations: Model removed or made unavailable on Civitai/CivArchive, site restructure relocating the model node in pageProps, race between listing data and detail page state.

Related errors

• CivArchive list page was missing pageProps
• CivArchive detail page was missing pageProps
• GetUserAccount did not contain an id
• Relative URL is required
• Relative URL did not contain a route path

AI-assisted analysis of LykosAI/StabilityMatrix@af93d6ef57 (2026-09-12). Data as JSON: /api/errors/29a0d3317deb8250. Report an issue: GitHub.

Appendix: source

Thrown at StabilityMatrix.Core/Api/CivArchiveApiClient.cs:201

        // at the model's primary version instead of pageProps.model — follow it like the
        // browser would. Guarded against self-redirects so a server quirk can't loop us.
        if (
            pageProps.Model is null
            && !string.IsNullOrWhiteSpace(pageProps.RedirectUrl)
            && BuildDetailDataPath(pageProps.RedirectUrl) != nextDataPath
        )
        {
            var redirected = await GetModelDetailsAsync(pageProps.RedirectUrl, cancellationToken);
            detailsCache.Add(
                nextDataPath,
                new CacheEntry<CivArchiveModelDetailsResponse>(DateTimeOffset.UtcNow, redirected)
            );
            return redirected;
        }

        var model =
            pageProps.Model
            ?? throw new InvalidOperationException("CivArchive detail page was missing model data");

        // The API returns version, platform, and platform_name as siblings of model
        // under pageProps, so merge them into the model object
        if (pageProps.Version is not null)
        {
            model.Version = pageProps.Version;
        }

        model.Platform ??= pageProps.Platform;
        model.PlatformName ??= pageProps.PlatformName;

        var detailsResult = new CivArchiveModelDetailsResponse { Model = model };
        detailsCache.Add(
            nextDataPath,
            new CacheEntry<CivArchiveModelDetailsResponse>(DateTimeOffset.UtcNow, detailsResult)
        );
        return detailsResult;
    }

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