Resolving GraphQL Filtering Issues in React with Hasura

Solution 1: Handling JSONB Filtering Error in React with GraphQL and Hasura

Approach 1: Using Enhanced Error Handling and Input Validation in React

import React from 'react';
import { useDashboardStore } from '../stores/dashboardStore';
import { useForm, Controller } from 'react-hook-form';
export function ChargeStageDashboard() {
  const { actions: { setFilters }, state: { filters } } = useDashboardStore();
  const { handleSubmit, control } = useForm();
  const onSubmit = (formData) => {
    const { clientesFiltro } = formData;
    const selectedStatus = clientesFiltro?.metadata || null;
    if (!selectedStatus) {
      console.warn('No valid status selected');
      return;
    }
    const updatedFilters = {
      ...filters.charges,
      where: {
        ...filters.charges.where,
        ClientePayload: { _contains: { Situacao: selectedStatus } }
      }
    };
    setFilters({ charges: updatedFilters });
  };
  return (
    <form onSubmit={handleSubmit(onSubmit)}>
      <Controller
        control={control}
        name="clientesFiltro"
        render={({ field: { onChange, value } }) => (
          <select onChange={onChange} value={value}>
            <option value="">Select Status</option>
            <option value="Ativo">Ativos</option>
            <option value="Inativo">Inativos</option>
          </select>
        )}
      />
      <button type="submit">Pesquisar</button>
    </form>
  );
}

Solution 2: GraphQL Query and Error Fix for JSONB Filtering

Approach 2: Modularized GraphQL Query with Error Handling

import gql from 'graphql-tag';
import { useQuery } from '@apollo/client';
const GET_CLIENTS = gql`
  query getClients($status: String!) {
    inadimplencia_Clientes(where: { ClientePayload: { _contains: { Situacao: $status } } }) {
      Cliente_Id
      ClientePayload
    }
  }`;
export function ChargeStageDashboard() {
  const { loading, error, data } = useQuery(GET_CLIENTS, {
    variables: { status: "Ativo" },
    onError: (err) => console.error('Error fetching clients:', err.message)
  });
  if (loading) return <p>Loading...</p>;
  if (error) return <p>Error: {error.message}</p>;
  return (
    <div>
      {data.inadimplencia_Clientes.map(client => (
        <p key={client.Cliente_Id}>{client.ClientePayload}</p>
      ))}
    </div>
  );
}

Solution 3: Advanced Filtering with Conditional Logic and Validation

Approach 3: Conditional JSONB Filter in React with Improved Error Messaging

import React from 'react';
import { useDashboardStore } from '../stores/dashboardStore';
import { useForm, Controller } from 'react-hook-form';
export function ChargeStageDashboard() {
  const { actions: { setFilters }, state: { filters } } = useDashboardStore();
  const { handleSubmit, control } = useForm();
  const onSubmit = (formData) => {
    try {
      const selectedStatus = formData?.clientesFiltro?.metadata || null;
      if (!selectedStatus) throw new Error("Invalid filter value");
      setFilters({
        charges: {
          ...filters.charges,
          where: {
            ...filters.charges.where,
            ClientePayload: { _contains: { Situacao: selectedStatus } }
          }
        }
      });
    } catch (error) {
      console.error("Failed to set filter:", error.message);
    }
  };
  return (
    <form onSubmit={handleSubmit(onSubmit)}>
      <Controller
        control={control}
        name="clientesFiltro"
        render={({ field: { onChange, value } }) => (
          <select onChange={onChange} value={value}>
            <option value="Ativo">Ativos</option>
            <option value="Inativo">Inativos</option>
          </select>
        )}
      />
      <button type="submit">Pesquisar</button>
    </form>
  );
}

Frequently Asked Questions on JSONB Filtering with GraphQL

1. What does _contains do in a GraphQL query?
2. The _contains operator checks if a JSONB field includes a specified value, making it perfect for filtering nested JSON data by matching specific keys.
3. Why does GraphQL throw a "Syntax Error: Expected Name" error?
4. This error occurs when GraphQL receives an unexpected data type, like a string where it expects a name or variable, as seen with the “Situacao” field in JSONB filtering.
5. How can I avoid JSONB filter errors in Hasura?
6. Using variables for nested JSON keys and setting them dynamically in the query, along with operators like _contains and _has_key, helps avoid common syntax errors.
7. Is JSONB filtering in Hasura similar to SQL querying?
8. Yes, JSONB filtering in Hasura uses GraphQL operators to mimic SQL-like queries. However, it requires specific syntax adjustments to handle nested JSON fields.
9. How do I troubleshoot filtering issues in GraphQL with Hasura?
10. Start by verifying the JSON structure in your database and testing the query in Hasura’s console. Implement error handling in React and check if the syntax or types are correct.
11. Why is Object.entries helpful in React with JSONB filters?
12. Object.entries simplifies accessing and filtering keys dynamically in JSON structures, reducing code complexity in large React apps.
13. How do I update my filters in React with useDashboardStore?
14. useDashboardStore is a custom hook that centralizes the filter state in React, allowing updates across components without redundancy.
15. Can I use GraphQL variables to handle JSONB filtering?
16. Yes, defining GraphQL variables allows dynamic handling of nested keys and data filtering, improving flexibility and reducing syntax errors.
17. What is the role of handleSubmit in React forms?
18. handleSubmit from React Hook Form manages form data submission and validation, which is essential for applying filters correctly.
19. Can JSONB fields improve data management in complex applications?
20. Absolutely! JSONB fields enable flexible data structures, ideal for evolving applications where data fields may vary based on client-specific data.

Concluding Thoughts on JSONB Filtering Challenges

Filtering JSONB data through GraphQL in React with Hasura can be straightforward, but errors like "Expected Name, found String" may occur due to JSON field handling in queries. By following structured filtering techniques, developers can overcome these issues.

Building reusable components and applying error handling ensures efficient filtering and improved reliability. These practices will help streamline the data flow and ensure that even nested fields are correctly filtered in applications. 🚀