text: import React, { Component } from 'react';
  import { Field, reduxForm } from 'redux-form';
  import { Link } from 'react-router-dom';
  import { connect } from 'react-redux';
  import { createPost } from '../actions';
  
  
  class PostsNew extends Component {
    renderField(field) {
      // field.meta
      const { meta : {touched, error} } = field;
      const className = `form-group ${touched && error ? 'has-danger' : ''}`;
  
      return (
        <div className={className}>
          <label>{field.label}</label>
          <input
            className="form-control"
            type="text"
            {...field.input}
          />
          <div className="text-help">
            {touched ? error : ''}
          </div>
        </div>
      )
    }
  
    onSubmit(values) {
      this.props.createPost(values, ()=>{
        this.props.history.push('/');
      });
    }
  
    render() {
      const { handleSubmit } = this.props;
  
      return (
        <form onSubmit={handleSubmit(this.onSubmit.bind(this))}>
          <Field
            label="Title"
            name="title"
            component={this.renderField}
          />
          <Field
            label="Categories"
            name="categories"
            component={this.renderField}
          />
          <Field
            label="Post Content"
            name="content"
            component={this.renderField}
          />
          <button type="submit" className="btn btn-primary">Submit</button>
          <Link to="/" className="btn btn-danger">Cancel</Link>
        </form>
      );
    }
  }
  
  function validate(values) {
    const errors = {};
  
    // Validate the inpurs from 'values'
    if (!values.title) {
      errors.title = "Enter a title!";
    }
  
    if (!values.categories) {
      errors.categories = "Enter some categories";
    }
  
    if (!values.content) {
      errors.content = "Enter some content"
    }
  
    // If erros is empty, the form is fine to submit
    // If errors has *any* properties, redux form assumes form is invalid
    return errors;
  }
  
  export default reduxForm({
    // validate: validate,
    validate,
    form: 'PostsNewForm'
  })(
    connect(null, { createPost })(PostsNew)
  );
  