FlowiseAI/Flowise · error · Error

Invalid array syntax

Error message

Invalid array syntax

What it means

parseArray requires the input to match /z\.array\(\s*([\s\S]*)\s*\)$/ — the string must END with ')' after the array content. This throws when the array call is unbalanced or does not terminate with a closing paren, e.g. 'z.array(z.string()' (missing close) or content that swallows the terminator.

Source

Thrown at packages/components/src/secureZodParser.ts:239

                if (!modMatch) {
                    throw new Error(`Invalid modifier: ${part}`)
                }

                const modName = modMatch[1]
                const modArgs = modMatch[2] ? this.parseArguments(modMatch[2]) : []

                type.modifiers.push({ name: modName, args: modArgs })
            }
        }

        return type
    }

    private static parseArray(typeStr: string): any {
        // Extract the content inside array()
        const arrayContentMatch = typeStr.match(/z\.array\(\s*([\s\S]*)\s*\)$/)
        if (!arrayContentMatch) {
            throw new Error('Invalid array syntax')
        }

        const arrayContent = arrayContentMatch[1].trim()

        // Parse the object inside the array
        if (arrayContent.startsWith('z.object(')) {
            // Extract object content
            const objectMatch = arrayContent.match(/z\.object\(\s*\{([\s\S]*)\}\s*\)/)
            if (!objectMatch) {
                throw new Error('Invalid object syntax inside array')
            }

            const objectContent = objectMatch[1]
            const objectProperties = this.parseObjectProperties(objectContent)

            // Validate each property in the nested object
            for (const propValue of Object.values(objectProperties)) {
                this.validateTypeInfo(propValue)

View on GitHub (pinned to abe4a8601a)

Solutions

1. Balance the parentheses so the array call ends with ')'.
2. For nested arrays, count opening and closing parens to ensure they match.

Example fix

// before
'z.object({ tags: z.array(z.string() })'

// after
'z.object({ tags: z.array(z.string()) })'

const validArrayCall = (v: string): boolean => /z\.array\(\s*[\s\S]*\s*\)$/.test(v)

When it happens

Trigger: 'z.array(z.string()' (missing ')'), 'z.array(z.string()]' (wrong bracket), or any z.array whose final ')' is missing.

Common situations: Truncating a schema string; nested arrays where parens are miscounted.

Related errors

• Invalid object syntax inside array
• Failed to parse Zod schema: ${error.message}
• Schema must start with z.object()
• Invalid z.object() syntax
• Invalid object syntax

AI-assisted analysis of FlowiseAI/Flowise@abe4a8601a (2026-08-12). Data as JSON: /api/errors/4b3e7a37bf6182e2. Report an issue: GitHub.